Encyclopedias, Almanacs, Transcripts, and Maps
- NIC (National Intelligence Council)
- Nicaragua, Intelligence and Security
- Nidal, Abu
- Niemotko v. Maryland 340 U.S. 268 (1951)
- Nigeria, Intelligence and Security
- Night Vision Scopes
- NIJ (National Institute of Justice)
- Nimmer, Melville B. (1923–1985)
- Ninth Amendment
- Ninth Amendment (Update)
- Nix v. Williams 467 U.S. 431 (1984)
- Nixon Administration (1969–1974), United States National Security Policy
- Nixon v. Administrator of General Services 433 U.S. 425 (1977)
- Nixon v. Condon 286 U.S. 73 (1932)
- Nixon v. Fitzgerald 457 U.S. 731 (1982) Harlow v. Fitzgerald 457 U.S. 800 (1982)
- Nixon v. Herndon 273 U.S. 536 (1927)
- Nixon v. United States 506 U.S. 224 (1993)
- Nixon, Richard M. (1913–1994)
- Nixon, United States v. 418 U.S. 683 (1974)
- NMIC (National Maritime Intelligence Center)