- Paine, Paul M. (Paul Mayo), 1869-19551
- Parkinson, J. B. (Draftsman)1
- Pearl, Holman I1
- Penny, R. (Engraver)1
- Perrine, C. O. (Charles O.)1
- Peters, Norris1
- Phelps & Ensign1
- Phelps, Humphrey,active 19th century,publisher.1
- Poirson, J. B. (Jean Baptiste), 1760-18311
- Poole Brothers1
- Potter, Albert F. (Albert Franklin), 1859-19441
- Québec (Province). Département de la Colonisation, des Mines et des Pécheries1
- Quist, Irving E.1
- Railroad Commission of Wisconsin1
- Ranney, Adolphus.1
- Reishus, E. S.1
- Remer E. N.1
- Reserve Lithographing & Printing Company.1
- Reuben H. Donnelley Corporation1
- Rice, G. Jay1