- Olney, J. (Jesse), 1798-18721
- Original by deBrahm, John Gercer William; Muller, M.P. C.E. (copy)1
- Ortelius, Abraham, 1527-15981
- Ottens, R. (Reinier), 1698-17501
- Ozanne, Pierre, 1737-1813.1
- P.F. Collier & Son Corporation1
- Phelipeau, René, active 1748-1784.1
- Phillips & Hunt (New York, N.Y.)1
- Pichon1
- Pingeling, T. A. (Thomas Albrecht), 1727-18031
- Poirson, J. B.1
- Popple, Henry, d. 17431
- Purvis, George1
- Quad, Matthias, 1557-16131
- R.L. Polk & Co.1
- Ramey, B. B1
- Rand McNally and Company1
- Rankin, Tom1
- Ransom, Rogers1
- Ray Bailey and Associates, Consulting Engineers1
