- Howard, John B. City Engineer1
- Hughes, Andrew, 18th cent.1
- Hussey, Roy, Hussey and Gay Consulting Services1
- Hutton, M.M.1
- J. H. Colton & Co.1
- J. de Bruyn Kops, Assoc. M. AM. SO. CE1
- J.H. Colton & Co.1
- JHK & Associates1
- Jaillot, Alexis Hubert, 1632?-17121
- Johnson, A. J. (Alvin Jewett), 1827-18841
- Jones, George1
- Kearney, James1
- Kehoe, S.P. Jr.1
- Kehoe, S.P. Jr. , Cobb, G.W., LA1
- Kehoe, S.P. Jr. , G.W. Cobb, LA1
- Kircher, Athanasius, 1602-16801
- Kops, J. deBruyn1
- L. Prang & Co1
- Laet, Joannes de, 1581-16491
- Laet, Joannes de, 1593-16491
