- McCulloch v. Maryland
- McGrain v. Daugherty
- Memoirs v. Massachusetts
- Meritor Savings Bank v. Vinson
- Metro Broadcasting, Inc. v. Federal Communications Commission
- Michael M. v. Superior Court of Sonoma County
- Military Law and Issues
- Minersville School District v. Gobitis
- Minor v. Happersett
- Miranda v Arizona
- Mississippi University for Women v. Hogan
- Mississippi v. Johnson
- Monroe v. Pape
- Moore v. East Cleveland
- Morrison v. Olson
- Muller v. Oregon
- National Association for the Advancement of Colored People v. Alabama
- National Labor Relations Board v. Jones & Laughlin Steel Corp.
- 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. Sullivan
- New York Times Company v. United States
- New York v. Belton
- Nixon v. Fitzgerald
- O'Connor v. Donaldson
- Oncale v. Sundowner Offshore Services Incorporated et al.
- Oregon v. Mitchell
