- Gordon, William, 1728-18071
- Graff, M. M1
- Graham, Augustus1
- Grand Union Hotel (New York, N.Y.)2
- Greensward Foundation2
- Grim, David, 1736-18261
- Grosvenor, Melville Bell, 1901-19821
- Guarnaccia, Steven1
- Hagstrom Company6
- Hagstrom Map Company5
- Hamburg Savings Bank (Brooklyn, New York, N.Y.)1
- Hamilton, W. L2
- Hardie, James, 1760 (ca.)-18261
- Harrison, J. F1
- Harrison, J. W. 1855-19251
- Harrison, John F2
- Hassler, F. R. 1770-18433
- Hayward, George7
- Hayward, George, approximately 1800-19
- Hayward, George, b. ca. 18001
- Helmsley-Spear, Inc1
- Hills, John (Surveyor)1
- Historic Urban Plans (Firm)1
- Hitchcock, Charles H. 1836-19191
- Hobbs, C. W1
- Holland, Samuel, 1728-18013
- Holmes, J. B1
- Hooker, William1
- Hooker, William, 1782-18561
- Hotel Bristol (New York, N.Y.)1
- Hotel Edison1
- Hotel Knickerbocker (New York, N.Y.)1
- Hunt & Eaton1
- Hyde, E. Belcher3
- Incentra International, Inc4
- Iris' Art Studio2
- Irving Trust Company1
- J.B. Beers & Co1
- J.H. Colton & Co3
- Jackson, G. R1
- Jacob K. Javits Convention Center (New York, N.Y.)1
- James Bleecker & Sons1
- James Mowlem & Co1
- Johnson & Browning1
- Johnson & Pratt Print. (New York, N.Y.)1
- Johnson and Ward1
- Johnson, A. J. 1827-18842
- Johnson, Jeremiah, 1768-18521
- Jones, Benjamin, active 1798-18151
- Jones, Lang, Wootton1
- Julius Bien & Co1
- Kemble, W1
- Kitchin, Thomas, 1718-17842
- Knott Hotels Corporation1
- L.L. Poates Engr'g Co3
- Lamb, Francis1
- Landauer (Firm)1
- Lasker, Toy1
- Lediard, P. M1
- Letts, Son & Co2