M
- Marbury v. Madison5 U.S. 137 (1803)
- Martin v. Hunter's Lessee14 U.S. 304 (1816)
- Masterpiece Cakeshop v. Colorado Civil Rights Comm'n138 S.Ct. 1719 (2018)
- Matal v. Tam137 S.Ct. 1744 (2017)
- Mccreary County v. American Civil Liberties Union Of Kentucky545 U.S. 844 (2005)
- Mcculloch v. Maryland17 U.S. 316 (1819)
- Meyer v. Nebraska262 U.S. 390 (1923)
- Michael H. v. Gerald D491 U.S. 110 (1989)