Encyclopedias, Almanacs, Transcripts, and Maps
- Massachusetts Board of Retirement v. MURGIA 427 U.S. 307 (1976)
- Massachusetts Body of Liberties (1641)
- Massachusetts Circular Letter (February 11, 1768)
- Massachusetts Constitution (October 25, 1780)
- Massachusetts General Laws and Liberties
- Massachusetts v. Laird 400 U.S. 886 (1970)
- Masses Publishing Company v. Patten 244 Fed. 535 (1917)
- Massiah v. United States 377 U.S. 201 (1964)
- Masson v. New Yorker Magazine, Inc. 501 U.S. 496 (1991)
- Mathews v. Eldridge 424 U.S. 319 (1976)
- Matthews, Stanley (1824–1889)
- Maximum Hours and Minimum Wages Legislation
- Maxwell v. Dow 176 U.S. 581 (1900)
- Mayor of New York v. Miln 11 Peters 102 (1837)
- Maysville Road Bill (1830)
- Mccardle, Ex Parte 7 Wallace (74 U.S.) 506 (1869)
- Mccleskey v. Kemp 481 U.S. 279 (1987)
- Mccloskey, Robert G. (1916–1969)
- Mccollum v. Board of Education 333 U.S. 203 (1948)
- Mccray v. United States 195 U.S. 27 (1904)