This is a list of all the United States Supreme Court cases from volume 491 of the United States Reports:
| Case name | Citation | Date decided |
|---|---|---|
| Pennsylvania v. Union Gas Co. | 491 U.S. 1 | 1989 |
| Will v. Dept. of State Police | 491 U.S. 58 | 1989 |
| Quinn v. Millsap | 491 U.S. 95 | 1989 |
| Michael H. v. Gerald D. | 491 U.S. 110 | 1989 |
| Patterson v. McLean Credit Union | 491 U.S. 164 | 1989 |
| Dellmuth v. Muth | 491 U.S. 223 | 1989 |
| Colonial Am. Life Ins. Co. v. Comm'r | 491 U.S. 244 | 1989 |
| Carella v. California | 491 U.S. 263 | 1989 |
| Missouri v. Jenkins | 491 U.S. 274 | 1989 |
| Consol. Rail Corp. v. Ry. Labor Executives' Ass'n | 491 U.S. 299 | 1989 |
| Healy v. Beer Institute | 491 U.S. 324 | 1989 |
| N.O. Pub. Serv. Inc. v. City of New Orleans | 491 U.S. 350 | 1989 |
| Jones v. Thomas | 491 U.S. 376 | 1989 |
| Texas v. Johnson | 491 U.S. 397 | 1989 |
| Pub. Citizen v. Dept. of Justice | 491 U.S. 440 | 1989 |
| Pitts. & Lake Erie R. Co. v. Ry. Labor Executives' Ass'n | 491 U.S. 490 | 1989 |
| Fla. Star v. B. J. F. | 491 U.S. 524 | 1989 |
| United States v. Zolin | 491 U.S. 554 | 1989 |
| Massachusetts v. Oakes | 491 U.S. 576 | 1989 |
| United States v. Monsanto | 491 U.S. 600 | 1989 |
| Caplin & Drysdale, Chartered v. United States | 491 U.S. 617 | 1989 |
| Harte-Hanks Communications, Inc. v. Connaughton | 491 U.S. 657 | 1989 |
| Jett v. Dallas Independent School Dist. | 491 U.S. 701 | 1989 |
| Flight Attendants v. Zipes | 491 U.S. 754 | 1989 |
| Ward v. Rock Against Racism | 491 U.S. 781 | 1989 |