- O'Donnell, Alexander V.1
- Odom, Samuel J.1
- Orr, James Lawrence, 1822-18731
- Osborn's Gallery1
- Palmer, A.P.1
- Peale, Washington1
- Perry, William Haynes (1839-1902)1
- Pettis, George H., fl. 18641
- Pierpont, James, 1822-18931
- Pressly, S. H.1
- Quinby & Co.1
- Quinby & Co., Charleston, So. Ca.1
- Quinby and Company (Charleston, S.C.)1
- Quinby and Company (Charleston, S.C.) (Firm)1
- Quinby, Charles J.1
- Randall, James R.1
- Rauch and Ramage Family Papers1
- Richardson, A. H. G.1
- Richardson, Thomas E. (1848-1933)1
- Rion, James H. (James Henry), 1828-18861