opinion: Per Curiam.
  This tort action was removed from the Texas state courts to the United States District Court on the grounds of diversity of citizenship but was remanded as having been “improperly removed” when it seemed that there was not complete diversity among the parties. The Court of Appeals for the Fifth Circuit, by mandamus, ordered the District Court to vacate its remand order because the latter had employed erroneous principles in concluding that it was without jurisdiction.
  The Court of Appeals erred. Title 28 U. S. C. § 1447 (c) provides for remanding a removed action when the district court determines that “the case was removed improvidently and without jurisdiction”; and when a remand has been ordered on these grounds, 28 U. S. C. § 1447 (d) unmistakably commands that the order “remanding a case to the State court from which it was removed is not reviewable on appeal or otherwise . . . .” The District Court’s remand order was plainly within the bounds of § 1447 (c) and hence was unreviewable by the Court of Appeals, by mandamus or otherwise. Thermtron Products, Inc. v. Hermansdorfer, 423 U. S. 336 (1976), is not to the contrary, for there the District Court remanded “on grounds wholly different from those upon which § 1447 (c) permits remand." Id., at 344. Thermtron did not question but re-emphasized the rule that § 1447 (c) remands are not reviewable.
  The petition for certiorari is granted, the judgment of the Court of Appeals is reversed, and the case is remanded for further proceedings consistent with this opinion.
  Reversed and remanded.
choices: comity: civil rights comity: criminal procedure comity: First Amendment comity: habeas corpus comity: military comity: obscenity comity: privacy comity: miscellaneous comity primarily removal cases, civil procedure (cf. comity, criminal and First Amendment); deference to foreign judicial tribunals assessment of costs or damages: as part of a court order Federal Rules of Civil Procedure including Supreme Court Rules, application of the Federal Rules of Evidence, Federal Rules of Appellate Procedure in civil litigation, Circuit Court Rules, and state rules and admiralty rules judicial review of administrative agency's or administrative official's actions and procedures mootness (cf. standing to sue: live dispute) venue no merits: writ improvidently granted no merits: dismissed or affirmed for want of a substantial or properly presented federal question, or a nonsuit no merits: dismissed or affirmed for want of jurisdiction (cf. judicial administration: Supreme Court jurisdiction or authority on appeal from federal district courts or courts of appeals) no merits: adequate non-federal grounds for decision no merits: remand to determine basis of state or federal court decision (cf. judicial administration: state law) no merits: miscellaneous standing to sue: adversary parties standing to sue: direct injury standing to sue: legal injury standing to sue: personal injury standing to sue: justiciable question standing to sue: live dispute standing to sue: parens patriae standing standing to sue: statutory standing standing to sue: private or implied cause of action standing to sue: taxpayer's suit standing to sue: miscellaneous judicial administration: jurisdiction or authority of federal district courts or territorial courts judicial administration: jurisdiction or authority of federal courts of appeals judicial administration: Supreme Court jurisdiction or authority on appeal or writ of error, from federal district courts or courts of appeals (cf. 753) judicial administration: Supreme Court jurisdiction or authority on appeal or writ of error, from highest state court judicial administration: jurisdiction or authority of the Court of Claims judicial administration: Supreme Court's original jurisdiction judicial administration: review of non-final order judicial administration: change in state law (cf. no merits: remand to determine basis of state court decision) judicial administration: federal question (cf. no merits: dismissed for want of a substantial or properly presented federal question) judicial administration: ancillary or pendent jurisdiction judicial administration: extraordinary relief (e.g., mandamus, injunction) judicial administration: certification (cf. objection to reason for denial of certiorari or appeal) judicial administration: resolution of circuit conflict, or conflict between or among other courts judicial administration: objection to reason for denial of certiorari or appeal judicial administration: collateral estoppel or res judicata judicial administration: interpleader judicial administration: untimely filing judicial administration: Act of State doctrine judicial administration: miscellaneous Supreme Court's certiorari, writ of error, or appeals jurisdiction miscellaneous judicial power, especially diversity jurisdiction