Mr. Justice White
delivered the opinion of the Court.
The questions in this case are whether a Federal District Judge may remand a properly removed diversity case for reasons not authorized by statute, and, if not, whether;such remand order may be remedied by writ of mandamus.
I
On April 9, 1973, two citizens and residents of Kentucky filed an action in a Kentucky state court against Thermtron Products, Inc., an Indiana corporation without office or place of business in Kentucky, and one Larry Dean Newhard, an employee of Thermtron and a citizen and resident of Indiana, seeking damages for injuries arising out of an automobile accident between plaintiffs’ automobile and a vehicle driven by Newhard. [338]*338Service on the defendants, who are petitioners here, was by substituted service on the Secretary of State of the Commonwealth, pursuant to Kentucky law. Later that month, petitioners removed the cause to the United States District Court for the Eastern District of Kentucky pursuant to 28 U. S. C. §§ 14411 and 1446.2 The [339]*339case was assigned a number, and tbe defendants filed their answer and later proceeded with discovery. On February 5, 1974, respondent judge issued an order in the case which recited that the action “was removed from the Pike Circuit Court, Pike County, Kentucky, on April 30, 1973, pursuant to the provisions of 28 U. S. C. § 1446,” that his court had reviewed its entire civil docket and found “that there is no available time in which to try the above-styled action in the foreseeable future” and that an adjudication of the merits of the case would be expedited in the state court. Record 31. The order then called upon the defendants to show cause “why the ends of justice do not require this matter [to] be remanded to the Pike Circuit Court . . . .” Ibid. In response to the [340]*340order, petitioners asserted that they believed they could not have a fair and impartial trial in the state courts, that the cause had been properly removed pursuant to the applicable statutes, that petitioners had a federal right to have the cause tried in the federal court, that respondent had no discretion to remand the case merely because of a crowded docket, and that there was no other legal ground for the remand.
On March 22, 1974, respondent filed a memorandum opinion and order remanding the case to the Pike Circuit Court. The opinion noted petitioners’ contention that they had a “right” to remove the action by properly invoking 28 U. S. C. § 1441, and remarked that “[t]he court must concede that fact.” Record 36. That right, the opinion then stated, nevertheless had to be “balanced against the plaintiffs’ right to a forum of their choice and their right to a speedy decision on the merits of their cause of action.” Ibid. Because of the District Court’s crowded docket and because other cases had priority on available trial time,3 “plaintiffs’ right of re[341]*341dress is being severely impaired,” which “would not be the case if the cause had not been removed from the state courts.” Id., at 37. Remarking that the purpose of the removal statute was to prevent prejudice in local courts and being of the view that petitioners had made no showing of possible prejudice that might follow from remand, respondent then ordered the case remanded.4
Petitioners then filed in the Court of Appeals for the Sixth Circuit their alternative petition for writ of mandamus or prohibition, requesting relief on the ground that the action had been properly removed and that respondent had no authority or discretion whatsoever to remand the case on the ground asserted by him. Based on the petition and respondent’s response, the Court of Appeals denied the petition after concluding (1) that the District Court had jurisdiction to enter the order for remand and (2) that the Court of Appeals [342]*342had no jurisdiction to review that order or to issue mandamus because of the prohibition against appellate review contained in 28 U. S. C. § 1447 (d). We granted the petition for certiorari, 420 U. S. 923 (1975), and now reverse.
II
Title 28 U. S. C. § 1441 (a) provides that unless otherwise expressly provided by Act of Congress, “any civil action brought in a State court of which the district courts of the United States have original jurisdiction,” may be removed by the defendant to the district court of the United States.5 Section 1446 provides the procedure for removal;6 and a case removed under that section may be remanded only in accordance with § 1447 which governs procedure after removal. Section 1447 (c) provides in part:
“If at any time before final judgment it appears that the case was removed improvidently and without jurisdiction, the district court shall remand the case, and may order the payment of just costs.”
The following section, § 1447 (d), generally forbids review of remand orders:
“An order remanding a case to the State court from which it was removed is not reviewable on appeal or otherwise, except that an order remanding a case to the State court from which it is removed pursuant to section 1443 of this title shall be reviewable by appeal or otherwise.” 7
[343]*343It is unquestioned in this case and conceded by petitioners that this section prohibits review of all remand orders issued pursuant to § 1447 (c) whether erroneous or not and whether review is sought by appeal or by extraordinary writ. This has been the established rule under § 1447 (d) and its predecessors stretching back to 1887. See, e. g., In re Pennsylvania Co., 137 U. S. 451 (1890); Ex parte Matthew Addy S. S. Co., 256 U. S. 417 (1921); Employers Reinsurance Corp. v. Bryant, 299 U. S. 374 (1937); United States v. Rice, 327 U. S. 742 (1946). If a trial judge purports to remand a case on the ground that it was removed “improvidently and without jurisdiction,” his order is not subject to challenge in the court of appeals by appeal, by mandamus, or otherwise.
The issue before us now is whether § 1447 (d) also bars review where a case has been properly removed and the remand order is issued on grounds not authorized by § 1447 (c). Here, respondent did not purport to proceed on the basis that this case had been removed “improvidently and without jurisdiction.” Neither the propriety of the removal nor the jurisdiction of the court [344]
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Mr. Justice White
delivered the opinion of the Court.
The questions in this case are whether a Federal District Judge may remand a properly removed diversity case for reasons not authorized by statute, and, if not, whether;such remand order may be remedied by writ of mandamus.
I
On April 9, 1973, two citizens and residents of Kentucky filed an action in a Kentucky state court against Thermtron Products, Inc., an Indiana corporation without office or place of business in Kentucky, and one Larry Dean Newhard, an employee of Thermtron and a citizen and resident of Indiana, seeking damages for injuries arising out of an automobile accident between plaintiffs’ automobile and a vehicle driven by Newhard. [338]*338Service on the defendants, who are petitioners here, was by substituted service on the Secretary of State of the Commonwealth, pursuant to Kentucky law. Later that month, petitioners removed the cause to the United States District Court for the Eastern District of Kentucky pursuant to 28 U. S. C. §§ 14411 and 1446.2 The [339]*339case was assigned a number, and tbe defendants filed their answer and later proceeded with discovery. On February 5, 1974, respondent judge issued an order in the case which recited that the action “was removed from the Pike Circuit Court, Pike County, Kentucky, on April 30, 1973, pursuant to the provisions of 28 U. S. C. § 1446,” that his court had reviewed its entire civil docket and found “that there is no available time in which to try the above-styled action in the foreseeable future” and that an adjudication of the merits of the case would be expedited in the state court. Record 31. The order then called upon the defendants to show cause “why the ends of justice do not require this matter [to] be remanded to the Pike Circuit Court . . . .” Ibid. In response to the [340]*340order, petitioners asserted that they believed they could not have a fair and impartial trial in the state courts, that the cause had been properly removed pursuant to the applicable statutes, that petitioners had a federal right to have the cause tried in the federal court, that respondent had no discretion to remand the case merely because of a crowded docket, and that there was no other legal ground for the remand.
On March 22, 1974, respondent filed a memorandum opinion and order remanding the case to the Pike Circuit Court. The opinion noted petitioners’ contention that they had a “right” to remove the action by properly invoking 28 U. S. C. § 1441, and remarked that “[t]he court must concede that fact.” Record 36. That right, the opinion then stated, nevertheless had to be “balanced against the plaintiffs’ right to a forum of their choice and their right to a speedy decision on the merits of their cause of action.” Ibid. Because of the District Court’s crowded docket and because other cases had priority on available trial time,3 “plaintiffs’ right of re[341]*341dress is being severely impaired,” which “would not be the case if the cause had not been removed from the state courts.” Id., at 37. Remarking that the purpose of the removal statute was to prevent prejudice in local courts and being of the view that petitioners had made no showing of possible prejudice that might follow from remand, respondent then ordered the case remanded.4
Petitioners then filed in the Court of Appeals for the Sixth Circuit their alternative petition for writ of mandamus or prohibition, requesting relief on the ground that the action had been properly removed and that respondent had no authority or discretion whatsoever to remand the case on the ground asserted by him. Based on the petition and respondent’s response, the Court of Appeals denied the petition after concluding (1) that the District Court had jurisdiction to enter the order for remand and (2) that the Court of Appeals [342]*342had no jurisdiction to review that order or to issue mandamus because of the prohibition against appellate review contained in 28 U. S. C. § 1447 (d). We granted the petition for certiorari, 420 U. S. 923 (1975), and now reverse.
II
Title 28 U. S. C. § 1441 (a) provides that unless otherwise expressly provided by Act of Congress, “any civil action brought in a State court of which the district courts of the United States have original jurisdiction,” may be removed by the defendant to the district court of the United States.5 Section 1446 provides the procedure for removal;6 and a case removed under that section may be remanded only in accordance with § 1447 which governs procedure after removal. Section 1447 (c) provides in part:
“If at any time before final judgment it appears that the case was removed improvidently and without jurisdiction, the district court shall remand the case, and may order the payment of just costs.”
The following section, § 1447 (d), generally forbids review of remand orders:
“An order remanding a case to the State court from which it was removed is not reviewable on appeal or otherwise, except that an order remanding a case to the State court from which it is removed pursuant to section 1443 of this title shall be reviewable by appeal or otherwise.” 7
[343]*343It is unquestioned in this case and conceded by petitioners that this section prohibits review of all remand orders issued pursuant to § 1447 (c) whether erroneous or not and whether review is sought by appeal or by extraordinary writ. This has been the established rule under § 1447 (d) and its predecessors stretching back to 1887. See, e. g., In re Pennsylvania Co., 137 U. S. 451 (1890); Ex parte Matthew Addy S. S. Co., 256 U. S. 417 (1921); Employers Reinsurance Corp. v. Bryant, 299 U. S. 374 (1937); United States v. Rice, 327 U. S. 742 (1946). If a trial judge purports to remand a case on the ground that it was removed “improvidently and without jurisdiction,” his order is not subject to challenge in the court of appeals by appeal, by mandamus, or otherwise.
The issue before us now is whether § 1447 (d) also bars review where a case has been properly removed and the remand order is issued on grounds not authorized by § 1447 (c). Here, respondent did not purport to proceed on the basis that this case had been removed “improvidently and without jurisdiction.” Neither the propriety of the removal nor the jurisdiction of the court [344]*344was questioned by respondent in the slightest.8 Section 1447 (c) was not even mentioned. Instead, the District Court’s order was based on grounds wholly different from those upon which § 1447 (c) permits remand. The determining factor was the District Court’s heavy docket, which respondent thought would unjustly delay plaintiffs in going to trial on the merits of their action. This consideration, however, is plainly irrelevant to whether the District Court would have had jurisdiction of the case had it been filed initially in that court, to the remova-bility of a case from the state court under § 1441, and hence to the question whether this cause was removed “improvidently and without jurisdiction” within the meaning of the statute.
Removal of cases from state courts has been allowed since the first Judiciary Act, and the right to remove has never been dependent on the state of the federal court’s docket. It is indeed unfortunate if the judicial manpower provided by Congress in any district is insufficient to try with reasonable promptness the cases properly filed in or removed to that court in accordance with the applicable statutes. But an otherwise properly removed action may no more be remanded because the district court considers itself too busy to try it than an action properly filed in the federal court in the first instance may be dismissed or referred to state courts for such reason. McClellan v. Carland, 217 U. S. 268 [345]*345(1910); Chicot County v. Sherwood, 148 U. S. 529 (1893); Hyde v. Stone, 20 How. 170 (1858).
We agree with petitioners: The District Court exceeded its authority in remanding on grounds not permitted by the controlling statute.9
Ill
Although the Court of Appeals, erroneously we think, held that the District Court had jurisdiction to enter its remand order, the Court of Appeals did not mention § 1447 (c), did not suggest that the District Court had proceeded under that section, properly or improperly, and did not itself suggest that this case was not removable under § 1441 or that it had been improvidently removed from the state court for want of jurisdiction or otherwise. In the face of petitioners’ position that the remand was for reasons not authorized by the statute, the Court of Appeals acted solely on the ground that under § 1447 (d) it had no jurisdiction to entertain a petition for writ of mandamus challenging the remand order issued by respondent in this case.
We disagree with that conclusion. Section 1447 (d) is not dispositive of the reviewability of remand orders in and of itself. That section and § 1447 (c) must be construed together, as this Court has said of the predecessors to these two sections in Employers Reinsurance Corp. v. Bryant, supra, at 380-381, and Kloeb v. Armour & Co., 311 U. S. 199, 202 (1940). These provisions, like their predecessors, “are in pari materia [and] are to be [346]*346construed, accordingly rather than as distinct enactments . . . Employers Reinsurance Corp. v. Bryant, supra, at 380. This means that only remand orders issued under § 1447 (c) and invoking the grounds specified therein — that removal was improvident and without jurisdiction — are immune from review under § 1447 (d).
Section 1447 (d) has its roots in the Act of Mar. 3, 1887, 24 Stat. 552. Prior to 1875, orders of remand were not reviewable by appeal or writ of error for want of a final judgment. Railroad Co. v. Wiswall, 23 Wall. 507 (1875). Section 5 of the Judiciary Act of 1875, 18 Stat. 472, provided that if the trial court became satisfied at any time during the pendency of a case brought in or removed to that court that the case did not really or substantially involve a dispute or controversy properly within its jurisdiction, the action was to be either dismissed or remanded to the court from which it was removed as justice might require. The section expressly provided that the order dismissing or remanding the cause was to be reviewable on writ of error or appeal.10 The Act of Mar. 3, 1887, however, while not disturbing [347]*347the provision for dismissal or remand for want of jurisdiction, not only repealed the provision in § 5 of the 1875 Act providing for appellate review of remand orders but contained a provision that “improperly removed” cases should be remanded and that “no appeal or writ of error from the decision of the circuit court so remanding such cause shall be allowed.” 24 Stat. 553.11 (Emphasis added.)
These provisions for the disposition of removed cases where jurisdiction was lacking or removal was otherwise improper, together with the prohibition of appellate review, were later included in §§28 and 37 of the Judicial Code of 1911, appeared in 28 U. S. C. §§ 71 and 80 (1946 ed.), 36 Stat. 1094, 1098, and endured until 1948 12 when [348]*34828 U. S. C. § 1447 was enacted — -minus, however, the prohibition against appellate review. The omission was corrected in 1949 when the predecessor of the present subsection (d) came into being.13
Until 1948, then, district courts were authorized to remand cases over which they had no jurisdiction or which had been otherwise “improperly” removed, and district court orders “so remanding” were not appealable. It was held that a case remanded for want of jurisdiction under § 80, which itself contained no prohibition of appellate review, was an “improperly” removed case under § 71 and hence subject to the reviewability bar of that section. Employers Reinsurance Corp. v. Bryant, 299 U. S. 374 (1937). But under the plain language of § 71, a case was “so- remanded” and within the review-ability prohibition only if it had been improperly removed. Insofar as we are advised, no case in this Court ever held that § 71 prohibited appellate review by mandamus of a remand order not purporting to be based on the statutory ground.14
[349]*349Sections 1447 (c) and (d) represent the 1948 recodifi-cation of §§71 and 80. They were intended to restate the prior law with respect to remand orders and their [350]*350reviewability.15 There is no indication whatsoever that Congress intended to extend the prohibition against review to reach remand orders entered on* grounds not provided by the statute.
[351]*351There is no doubt that in order to prevent delay in the trial of remanded cases by protracted litigation of jurisdictional issues, United States v. Rice, 327 U. S., at 751, Congress immunized from all forms of appellate review any remand order issued on the grounds specified in § 1447 (c), whether or not that order might be deemed erroneous by an appellate court. But we are not convinced that Congress ever intended to extend carte blanche authority to the district courts to revise the federal statutes governing removal by remanding cases on grounds that seem justifiable to them but which are not recognized by the controlling statute. That justice may move more slowly in some federal courts than in their state counterparts is not one of the considerations that Congress has permitted the district courts to recognize in passing on remand issues. Because the District Judge remanded a properly removed case on grounds that he had no authority to consider, he exceeded his statutorily defined power; and issuance of the writ of mandamus was not barred by § 1447 (d).
In so holding we neither disturb nor take issue with the well-established general rule that § 1447 (d) and its [352]*352predecessors were intended to forbid review by appeal or extraordinary writ of any order remanding a case on the grounds permitted by the statute. But this Court has not yet construed the present or past prohibition against review of remand orders so as to extinguish the power of an appellate court to correct a district court that has not merely erred in applying the requisite provision for remand but has remanded a case on grounds not specified in the statute and not touching the propriety of the removal. We decline to construe § 1447 (d) so woodenly as to reach that result now.
IV
There remains the question whether absent the bar of § 1447 (d) against appellate review, the writ of mandamus is an appropriate remedy to require the District Court to entertain the remanded action. The answer is in the affirmative.
A “traditional use of the writ in aid of appellate jurisdiction both at common law and in the federal courts has been to confine an inferior court to a lawful exercise of its prescribed jurisdiction or to compel it to exercise its authority when it is its duty to do so.” Roche v. Evaporated Milk Assn., 319 U. S. 21, 26 (1943); Ex parte Peru, 318 U. S. 578, 584 (1943); Bankers Life & Cas. Co. v. Holland, 346 U. S. 379, 382 (1953). “Repeated decisions of this Court have established the rule . . . that the writ will lie in a proper case to direct a subordinate Federal court to decide a pending cause,” Insurance Co. v. Comstock, 16 Wall. 258, 270 (1873), or to require “a Federal court of inferior jurisdiction to reinstate a case, and to proceed to try and adjudicate the same.” McClellan v. Garland, 217 U. S., at 280.
In accordance with the foregoing cases, this Court has declared that because an order remanding a removed [353]*353action does not represent a final judgment re viewable by appeal, “[t]he remedy in such a case is by mandamus to compel action, and not by writ of error to review what has been done.” Railroad Co. v. Wiswall, 23 Wall., at 508. Absent statutory prohibitions, when a remand order is challenged by a petition for mandamus in an appellate court, “the power of the court to issue the mandamus would be undoubted.” In re Pennsylvania Co., 137 U. S., at 453. There is nothing in our later cases dealing with the extraordinary writs that leads us to question the availability of mandamus in circumstances where the district court has refused to adjudicate a case, and has remanded it on grounds not authorized by the removal statutes. See Will v. United States, 389 U. S. 90 (1967); Schlagenhauf v. Holder, 379 U. S. 104 (1964); La Buy v. Howes Leather Co., 352 U. S. 249 (1957); McCullough v. Cosgrave, 309 U. S. 634 (1940); Los Angeles Brush Corp. v. James, 272 U. S. 701 (1927). On the contrary, these cases would support the use of mandamus to prevent nullification of the removal statutes by remand orders resting on grounds having no warrant in the law.
The judgment of the Court of Appeals is reversed, and the case is remanded to that court for further proceedings consistent with this opinion.
So ordered.
Mr. Justice Stevens took no part in the consideration or decision of this case.