opinion: Per Curiam.
  Petitioners seek to challenge a consent decree approving an agreement settling a Title VII lawsuit against the City of New York. After the results of a police sergeant’s examination revealed that blacks and Hispanics had passed the examination at disproportionately low rates, groups representing these minority members of the New York City Police Department sued the Department under Title VII of the Civil Rights Act of 1964, 78 Stat. 253, as amended, 42 U. S. C. § 2000e et seq. Three other groups were permitted to intervene as codefendants: “the Sergeants Benevolent Association (‘SBA’), representing over 500 officers on the eligible list who had obtained provisional appointments as sergeants; the Sergeants Eligibles Association (‘SEA’), representing officers who were on the eligible list but had not received provisional appointments; and various white ethnic societies and other individual officers (the ‘Schneider Intervenors’).” Hispanic Society of New York City Police Dept. v. New York City Police Dept., 806 F. 2d 1147, 1151 (CA2 1986) (Costello case below). The parties reached settlement, which was first approved by the District Court on an interim basis, and finally, after a hearing, by consent decree. The settlement provided that black and Hispanic candidates who had failed to make the eligible list would be promoted until the racial/ethnic composition of the new sergeants was approximately the same as the racial/ethnic composition of the group of candidates taking the test. The SBA and the SEA signed the agreement; the Schneider Intervenors, although opposing the settlement, chose not to appeal.
  Petitioners are a group of white police officers who claim that they were not placed on the eligible list even though they had scored at least as high on the examination as the lowest scoring minority officer promoted under the interim order. Although they presented their objections to the District Court at the hearing, they chose not to move to intervene pursuant to Federal Rule of Civil Procedure 24, either initially as codefendants or later to replace the Schneider Intervenors for purposes of appeal. See United Airlines, Inc. v. McDonald, 432 U. S. 385, 395 (1977). Instead, they filed suit during the period between the interim approval of the settlement and the final consent decree, claiming a violation of their Fourteenth Amendment equal protection rights. In 806 F. 2d 1144 (CA2 1986) (Marino case below), the Court of Appeals affirmed the District Court’s dismissal of petitioners’ suit, deeming it an impermissible collateral attack on a consent decree by persons who could have intervened in the underlying litigation. Petitioners also attempted to appeal from the consent decree. In Costello, the Court of Appeals dismissed the appeal because petitioners were not parties to the litigation giving rise to the consent decree. 806 F. 2d 1147 (CA2 1986). We granted certiorari to consider these judgments, 481 U. S. 1047 (1987).
  As to the issue raised in Marino, namely, whether a district court may dismiss as an impermissible collateral attack a lawsuit challenging a consent decree by nonparties to the underlying litigation, we are equally divided, and therefore affirm the judgment of the Court of Appeals. As to the issue raised in Costello, we hold that because petitioners were not parties to the underlying lawsuit, and because they failed to intervene for purposes of appeal, they may not appeal from the consent decree approving that lawsuit’s settlement; therefore, we affirm the judgment of the Court of Appeals. The rule that only parties to a lawsuit, or those that properly become parties, may appeal an adverse judgment, is well settled. See, e. g., United States ex rel. Louisiana v. Jack, 244 U. S. 397, 402 (1917); Fed. Rule App. Proc. 3(c) (“The notice of appeal shall specify the party or parties taking the appeal”). The Court of Appeals suggested that there may be exceptions to this general rule, primarily “when the nonparty has an interest that is affected by the trial court’s judgment.” 806 F. 2d, at 1152. We think the better practice is for such a nonparty to seek intervention for purposes of appeal; denials of such motions are, of course, appealable. See United Airlines, Inc., supra.
  Accordingly, the judgments of the Court of Appeals are
  Affirmed.
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