Encyclopedias, Almanacs, Transcripts, and Maps
- Day, William R. (1849–1923)
- Dayton, Jonathan (1760–1824)
- Dayton-Goose Creek Railway Company v. United States 263 U.S. 456 (1924)
- De Facto/De Jure
- De Jonge v. Oregon 299 U.S. 353 (1937)
- De Minimis non Curat Lex
- Dead Drop Spike
- Dead-Letter Box
- Dean Milk Company v. City of Madison 340 U.S. 349 (1951)
- Debs v. United States 249 U.S. 211 (1919)
- Debs, In Re 158 U.S. 564 (1895)
- Declaration of Independence 1 Stat. 1 (July 4, 1776)
- Declaration of War
- Declaratory Judgment
- Defense Nuclear Facilities Safety Board, United States
- Defense Security Service, United States
- Defunis v. Odegaard 416 U.S. 312 (1974)
- Delegation of Power
- Delegation of Power (Update)
- Deliberative Democracy