- NAACP v. Button
- Nashville, Chattanooga, & St. Louis Railway v. Wallace
- National Association for the Advancement of Colored People v. Alabama
- National Labor Relations Board v. Jones & Laughlin Steel Corp.
- National League of Cities v. Usery
- National Organization for Women, Inc. v. Scheidler
- National Security
- National Treasury Employees Union v. Von Raab
- Native Americans
- Near v. Minnesota
- Nebbia v. New York
- Nebraska Press Association v. Stuart
- New Jersey v. T.L.O.
- New York Times Company v. United States
- New York Times v. Sullivan
- New York v. Belton
- New York v. Ferber
- New York v. Quarles
- New York v. Sanger
- New York v. United States
- New York v. United States
- Nix v. Whiteside
- Nix v. Williams
- Nixon v. Fitzgerald
- Nixon v. United States
- Nollan v. California Coastal Commission
- Nordlinger v. Hahn
- Norman-Bloodsaw v. Lawrence Berkeley Laboratory
- North Carolina v. T. D. R.
- Northern Pipeline Co. v. Marathon Pipe Line Co.
