Opinion of the Court by
Mr. Justice Marshall,
announced by Mr. Chief Justice Burger.
The appellees brought this action to challenge a plan redistricting the justice of the peace precincts in Harris County, Tex. Because the plan provided for consolidation of several precincts, three justices of the peace and two constables lost their jobs. These five officials, along with two voters from the defunct precincts, sought to enjoin implementation of the redistricting plan on the ground that the Texas statute providing for their removal from office at the time of redistricting denied them the equal protection of the laws. The three-judge District Court granted relief, declaring the statute unconstitutional and enjoining the redistricting. The order of the District Court was stayed by Mr. Justice Powell. We denied a motion to vacate the stay, 415 U. S. 905 (1974), and subsequently noted probable jurisdiction, 417 U. S. 928 (1974). We reverse and remand to the District Court with instructions to dismiss the complaint without prejudice.
I
Under Texas law, the Commissioners Court is the general governing body of each county; one of its duties is to divide the county into precincts for the election of justices of the peace and constables, and to redistrict the precincts when necessary. Tex. Rev. Civ. Stat. Ann., Art. 2351 (1) (1971).
In June 1973, the Commissioners Court of Harris County adopted a redistricting plan for the eight justice [79]*79of the peace precincts in the county. The last redistricting had taken place in 1876, and the enormous population changes in the Houston area had resulted in gross disparities in population among the precincts: the largest precinct contained approximately one million persons, while the smallest had fewer than 7,000.
Under the old plan, one justice of the peace and one constable were assigned to each precinct except the largest, which was allotted two justices and one constable. Because of the apparent discrepancy in the workload of the officials in different precincts, the Commissioners Court adopted a redistricting plan that redrew the precinct lines. Although the proposed new precincts still varied substantially in population size, the disparity was much less than it had been.
Among other changes, the plan consolidated three of the smallest precincts and parts of two others into a single new precinct. As a result, four justices and three constables found themselves residents of a single precinct, which was entitled by law to a maximum of only one constable and two justices of the peace. Pursuant to a Texas statute, Tex. Rev. Civ. Stat. Ann., Art 2351% (c) (1971), the Commissioners Court declared the constable and justice posts for that precinct to be vacant, since there were more officials living in the precinct than positions available.1 The Commissioners Court then filled the [80]*80vacancies, Tex. Rev. Civ. Stat. Ann., Art. 2355 (1971), appointing one of the displaced constables to the new constable post and one of the displaced justices to one of the two new justice positions. A nonincumbent was appointed to fill the other slot.
The five officeholders, threatened with removal prior to the expiration of their elected terms, resorted to court action in an effort to block implementation of the redistricting plan. One of the constables filed suit in state court, but when that court denied his application for a temporary injunction, he apparently abandoned the action. Shortly thereafter, the three displaced justices and two constables, along with two voters who had lived in their precincts, brought suit in the United States District Court for the Southern District of Texas, claiming that the redistricting scheme was unconstitutional. Their removal pursuant to Art. 2351% (c) violated the Due Process and Equal Protection Clauses of the Fourteenth Amendment, the officials contended. More specifically, they argued that the redistricting order was [81]*81constitutionally invalid because it did not meet “one man, one vote” standards, because it denied voters in certain precincts the full effect of their votes, and because the precincts were redrawn along racial lines. Although the appellees did not expressly raise a state-law claim in their complaint,2 they argued in their pretrial brief that Art. 2351% (c) was invalid under the State Constitution as well, relying on several state-court cases and two opinions of the Texas Attorney General. In response, the appellants requested that the complaint be dismissed because the suit raised no substantial federal questions and because the appellees had failed to exhaust their state remedies before bringing suit in federal court.3
A three-judge court was convened. It heard argument and issued an order later the same day. In its order, the court asserted jurisdiction and enjoined implementation of the redistricting plan on the ground that the Texas statute providing for the removal of the plaintiff justices and constables. was unconstitutional on its face. A week later the court filed a brief opinion in which it wrote that insofar as the statute shortens the term of an elected public official merely because redistricting places him in a district with others, “it invidiously and irrationally discriminates between him and others not so affected.” In addition, the court held that the statute as applied had discriminated between those who voted for or were entitled to vote for the displaced officials, and the voters in other precincts where the [82]*82elected officials were permitted to serve a full term. Because it found no compelling interest served by redistricting in the middle of plaintiffs’ terms,4 the court held that to the extent that the redistricting order appointed other persons to plaintiffs’ offices and prevented plaintiffs from carrying out their duties and receiving their salaries for the remainder of their elected terms, the order was invalid.5
II
The appellants urge us to reverse the District Court on the merits or, in the alternative, to order the court to abstain pending determination of the state-law questions that pervade this case.6 Because we agree with appellants that the District Court should have abstained, we [83]*83reverse without reaching the merits of the equal protection claim sustained by the District Court.
In Railroad Comm’n v. Pullman Co., 312 U. S. 496 (1941), the Court held that when a federal constitutional claim is premised on an unsettled question of state law, the federal court should stay its hand in order to provide the state courts an opportunity to settle the underlying state-law question and thus avoid the possibility of unnecessarily deciding a constitutional question. Since that decision, we have invoked the “Pullman doctrine” on numerous occasions. E. g., Lake Carriers’ Assn. v. MacMullan, 406 U. S. 498 (1972); Askew v. Hargrave, 401 U. S. 476 (1971); Reetz v. Bozanich, 397 U. S. 82 (1970); Harrison v. NAACP,
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Opinion of the Court by
Mr. Justice Marshall,
announced by Mr. Chief Justice Burger.
The appellees brought this action to challenge a plan redistricting the justice of the peace precincts in Harris County, Tex. Because the plan provided for consolidation of several precincts, three justices of the peace and two constables lost their jobs. These five officials, along with two voters from the defunct precincts, sought to enjoin implementation of the redistricting plan on the ground that the Texas statute providing for their removal from office at the time of redistricting denied them the equal protection of the laws. The three-judge District Court granted relief, declaring the statute unconstitutional and enjoining the redistricting. The order of the District Court was stayed by Mr. Justice Powell. We denied a motion to vacate the stay, 415 U. S. 905 (1974), and subsequently noted probable jurisdiction, 417 U. S. 928 (1974). We reverse and remand to the District Court with instructions to dismiss the complaint without prejudice.
I
Under Texas law, the Commissioners Court is the general governing body of each county; one of its duties is to divide the county into precincts for the election of justices of the peace and constables, and to redistrict the precincts when necessary. Tex. Rev. Civ. Stat. Ann., Art. 2351 (1) (1971).
In June 1973, the Commissioners Court of Harris County adopted a redistricting plan for the eight justice [79]*79of the peace precincts in the county. The last redistricting had taken place in 1876, and the enormous population changes in the Houston area had resulted in gross disparities in population among the precincts: the largest precinct contained approximately one million persons, while the smallest had fewer than 7,000.
Under the old plan, one justice of the peace and one constable were assigned to each precinct except the largest, which was allotted two justices and one constable. Because of the apparent discrepancy in the workload of the officials in different precincts, the Commissioners Court adopted a redistricting plan that redrew the precinct lines. Although the proposed new precincts still varied substantially in population size, the disparity was much less than it had been.
Among other changes, the plan consolidated three of the smallest precincts and parts of two others into a single new precinct. As a result, four justices and three constables found themselves residents of a single precinct, which was entitled by law to a maximum of only one constable and two justices of the peace. Pursuant to a Texas statute, Tex. Rev. Civ. Stat. Ann., Art 2351% (c) (1971), the Commissioners Court declared the constable and justice posts for that precinct to be vacant, since there were more officials living in the precinct than positions available.1 The Commissioners Court then filled the [80]*80vacancies, Tex. Rev. Civ. Stat. Ann., Art. 2355 (1971), appointing one of the displaced constables to the new constable post and one of the displaced justices to one of the two new justice positions. A nonincumbent was appointed to fill the other slot.
The five officeholders, threatened with removal prior to the expiration of their elected terms, resorted to court action in an effort to block implementation of the redistricting plan. One of the constables filed suit in state court, but when that court denied his application for a temporary injunction, he apparently abandoned the action. Shortly thereafter, the three displaced justices and two constables, along with two voters who had lived in their precincts, brought suit in the United States District Court for the Southern District of Texas, claiming that the redistricting scheme was unconstitutional. Their removal pursuant to Art. 2351% (c) violated the Due Process and Equal Protection Clauses of the Fourteenth Amendment, the officials contended. More specifically, they argued that the redistricting order was [81]*81constitutionally invalid because it did not meet “one man, one vote” standards, because it denied voters in certain precincts the full effect of their votes, and because the precincts were redrawn along racial lines. Although the appellees did not expressly raise a state-law claim in their complaint,2 they argued in their pretrial brief that Art. 2351% (c) was invalid under the State Constitution as well, relying on several state-court cases and two opinions of the Texas Attorney General. In response, the appellants requested that the complaint be dismissed because the suit raised no substantial federal questions and because the appellees had failed to exhaust their state remedies before bringing suit in federal court.3
A three-judge court was convened. It heard argument and issued an order later the same day. In its order, the court asserted jurisdiction and enjoined implementation of the redistricting plan on the ground that the Texas statute providing for the removal of the plaintiff justices and constables. was unconstitutional on its face. A week later the court filed a brief opinion in which it wrote that insofar as the statute shortens the term of an elected public official merely because redistricting places him in a district with others, “it invidiously and irrationally discriminates between him and others not so affected.” In addition, the court held that the statute as applied had discriminated between those who voted for or were entitled to vote for the displaced officials, and the voters in other precincts where the [82]*82elected officials were permitted to serve a full term. Because it found no compelling interest served by redistricting in the middle of plaintiffs’ terms,4 the court held that to the extent that the redistricting order appointed other persons to plaintiffs’ offices and prevented plaintiffs from carrying out their duties and receiving their salaries for the remainder of their elected terms, the order was invalid.5
II
The appellants urge us to reverse the District Court on the merits or, in the alternative, to order the court to abstain pending determination of the state-law questions that pervade this case.6 Because we agree with appellants that the District Court should have abstained, we [83]*83reverse without reaching the merits of the equal protection claim sustained by the District Court.
In Railroad Comm’n v. Pullman Co., 312 U. S. 496 (1941), the Court held that when a federal constitutional claim is premised on an unsettled question of state law, the federal court should stay its hand in order to provide the state courts an opportunity to settle the underlying state-law question and thus avoid the possibility of unnecessarily deciding a constitutional question. Since that decision, we have invoked the “Pullman doctrine” on numerous occasions. E. g., Lake Carriers’ Assn. v. MacMullan, 406 U. S. 498 (1972); Askew v. Hargrave, 401 U. S. 476 (1971); Reetz v. Bozanich, 397 U. S. 82 (1970); Harrison v. NAACP, 360 U. S. 167 (1959); Spector Motor Service, Inc. v. McLaughlin, 323 U. S. 101 (1944); see Field, Abstention in Constitutional Cases: The Scope of the Pullman Abstention Doctrine, 122 U. Pa. L. Rev. 1071, 1084-1101 (1974). We have repeatedly warned, however, that because of the delays inherent in the abstention process and the danger that valuable federal rights might be lost in the absence of expeditious adjudication in the federal court, abstention must be invoked only in “special circumstances,” see Zwickler v. Koota, 389 U. S. 241, 248 (1967), and only upon careful consideration of the facts of each case. Baggett v. Bullitt, 377 U. S. 360, 375-379 (1964); Railroad Comm’n v. Pullman Co., supra, at 500.
Where there is an action pending in state court that will likely resolve the state-law questions underlying the federal claim, we have regularly ordered abstention. See Askew v. Hargrave, supra; Albertson v. Millard, 345 U. S. 242 (1953); Chicago v. Fieldcrest Dairies, Inc., 316 U. S. 168, 173 (1942); cf. Meredith v. Winter Haven, 320 U. S. 228, 236 (1943).7 Similarly, when the state-[84]*84law questions have concerned matters peculiarly within the province of the local courts, see Reetz v. Bozanich, supra; Fornaris v. Ridge Tool Co., 400 U. S. 41 (1970); cf. Louisiana Power & Light Co. v. City of Thibodaux, 360 U. S. 25 (1959), we have inclined toward abstention. On the other hand, where the litigation has already been long delayed, see Hostetter v. Idlewild Bon Voyage Liquor Corp., 377 U. S. 324, 329 (1964), or where it has seemed unlikely that resolution of the state-law question would significantly affect the federal claim, see Chicago v. Atchison, T. & S. F. R. Co., 357 U. S. 77, 84 (1958); Public Utilities Comm’n v. United Fuel Cas Co., 317 U. S. 456, 462-463 (1943), the Court has held that abstention should not be required.
Among the cases that call most insistently for abstention are those in which the federal constitutional challenge turns on a state statute, the meaning of which is unclear under state law. If the state courts would be likely to construe the statute in a fashion that would avoid the need for a federal constitutional ruling or otherwise significantly modify the federal claim, the argument for abstention is strong. See Kusper v. Pontikes, 414 U. S. 51 (1973); Lake Carriers’ Assn. v. MacMullan, supra; Harman v. Forssenius, 380 U. S. 528 (1965); Harrison v. NAACP, supra. The same considerations apply where, as in this case, the uncertain status of local law stems from the unsettled relationship between the state constitution and a statute.8 Here resolution of the [85]*85question whether the Texas Constitution permits the County Commissioners Court to replace constables and justices of the peace when several live in the same precinct will define the scope of Art. 2351% (c) and, as a consequence, the nature and continued vitality of the federal constitutional claim. As we wrote in Reetz v. Bozanich, 397 U. S., at 87, “the nub of the whole controversy may be the state constitution.”
The appellees insist that abstention would be improper in this case because a Texas court construction of Art. 2351% (c) would not modify or avoid the equal protection question passed on by the District Court. Having analyzed the relevant Texas statutes, constitutional provisions, and precedents, however, we are unable to share their conviction.
The Texas Constitution provides that a justice of the peace or constable “shall hold his office for four years and until his successor shall be elected and qualified.” Art. 5, § 18. Justices of the peace and constables may be removed by state district court judges for various causes, after notice and a trial by jury. Art. 5, § 24. What is unsettled is whether these two provisions ensure justices and constables tenure until the completion of their elected terms even when midterm redistricting places them outside their original precinct or puts them into a precinct that has more than its full complement of officeholders.
[86]*86In two early cases, the Texas courts held that the State Constitution provides no guarantee of tenure for justices and constables when the County Commissioners Court elects to exercise its redistricting authority. State ex rel. Dowlen v. Rigsby, 17 Tex. Civ. App. 171, 43 S. W. 271, holding approved, 91 Tex. 351, 43 S. W. 1101 (1897); Ward v. Bond, 10 S. W. 2d 590 (Tex. Ct. Civ. App. 1928). The State Supreme Court later appeared to reverse this stand in approving a lower court decision that the State Constitution guaranteed to county commissioners the right to serve until the expiration of their terms, even if redistricting resulted in their living outside their precincts. Childress County v. Sachse, 310 S. W. 2d 414 (Tex. Ct. Civ. App.), holding approved, 158 Tex. 371, 312 S. W. 2d 380 (1958). In an opinion filed shortly before the District Court hearing in this case, the Texas Attorney General applied the reasoning of the Sachse case and ruled that to the extent that Art. 2351% (c) vacated the office of a justice of the peace who no longer lived within his precinct, the statute was invalid.9 The Attorney General concluded that the State Constitution entitles justices and constables to serve their full terms unless they are removed pursuant to Art. 5, § 24. Op. Atty. Gen. H-220 (1974). The reasoning of the Attorney General’s opinion would appear to extend to this [87]*87case.10 Although appellants contend that the Attorney-General has misconstrued the Texas precedents, it seems far from settled that under state law the appellee officeholders must lose their jobs.11
These difficult state-law questions intrude in yet another way that strengthens the case for abstention. The proper scope of the order entered by the District Court and the applicability of that order to the plaintiffs’ claims depend directly on questions of state law. The court’s initial order held Art. 2351% (c) unconstitutional and enjoined the redistricting plan altogether. In its opinion, the court apparently intended to narrow its order somewhat, by holding the statute unconstitutional as applied and by enjoining the redistricting order only to the extent that it removed the appellees from their jobs. Yet even that relief was broader than the court’s holding would support. Absent Art. 2351% (c), Texas law may well dictate that upon redistricting, all the justice and constable positions in the county would be vacated.12 [88]*88Since the District Court concluded only that Art. 2351% (c) denied the officeholders and voters equal protection by removing some officials in the county but not others, it should not automatically have imposed one remedy — reinstatement—when Texas law might well call for quite another — removal of all the affected officeholders. Yet if the District Court had limited itself to declaring Art. 2351% (c) unconstitutional, and the Commissioners Court had determined that state law would then require that all the county justice and constable positions be vacated,13 the appellees would be forced to resort to state court in order to vindicate their claimed right to reinstatement. In short, not only the character of the federal right asserted in this case, but even the availability of the relief sought turn in large part on the same unsettled state-law questions. Because the federal claim in this case is “entangled in a skein of state law that must be untangled before the federal case can proceed,” McNeese v. Board of Education, 373 U. S. 668, 674 (1963), we conclude that the District Court erred in not adopting appellants’ suggestion to abstain.
In order to remove any possible obstacles to- state-court jurisdiction, we direct the District Court to dismiss the complaint.14 The dismissal should be without prejudice [89]*89so that any remaining federal claim may be raised in a federal forum after the Texas courts have been given the opportunity to address the state-law questions in this case. England v. Louisiana State Board of Medical Examiners, 375 U. S. 411, 421-422 (1964).
Reversed and remanded.