Encyclopedias, Almanacs, Transcripts, and Maps
- Hutchinson, Thomas (1711–1780)
- Hyde Amendment
- Hylton v. United States 3 Dallas 171 (1796)
- Hypersonic Aircraft
- IDENT (Automated Biometric Identification System)
- Illegal Immigration Reform and Immigrant Responsibility Act 110 Stat. 3009 (1996)
- Illinois v. Gates 462 U.S. 213 (1983)
- Illinois v. Perkins 496 U.S. 292 (1990)
- Illinois v. Rodriguez 497 U.S. 177 (1990)
- Imbler v. Pachtman 424 U.S. 409 (1976)
- IMINT (Imagery Intelligence)
- Immigration and Alienage
- Immigration and Alienage (Update 1)
- Immigration and Alienage (Update 2)
- Immigration and Naturalization Service v. Chadha 462 U.S. 919 (1983)
- Immigration Reform and Control Act 100 Stat. 3359 (1986)
- Immunity Grant (Self-Incrimination)
- Immunity of Public Officials
- Impeachment (Update)
- Implied Constitutional Rights of Action