- Bache, A. D. (Alexander Dallas), 1806-18671
- Blackford, W. W. (William Willis), 1831-19051
- Bowen & Co.1
- Clifford, Alan F., 1919-19951
- Clifford, Shirley Mittleman, 1923-19971
- Clifford-Wysor family1
- Filson, John, ca. 1747-17881
- Harden, E. B. (Edward B.)1
- Harden, J. H. (John Henry), b.18361
- Hassler, F. R. (Ferdinand Rudolph), 1770-18431
- Historic Urban Plans (Firm)1
- L'Enfant, Pierre Charles, 1754-18251
- Mount Vernon Ladies' Association of the Union1
- Mullet, John1
- United States George Washington Bicentennial Commission1