- Oer, Theobald von
- Orbigny, Alcide Dessalines d'
- Orlik, Emil
- Ospovat, Henry
- Oudart, Paul Louis
- Paget, Sidney
- Pannemaeker, Pierre Joseph de
- Paqueau, Gaston
- Pasti, Matteo di
- Pauquet, Hippolyte
- Pedersen, Vilhelm
- Penguilly L'Haridon, Octave
- Pérignon, Alexis
- Pérot, E.
- Pether, Abraham
- Philippoteaux, Paul Dominique
- Pickersgill, Frederick Richard
- Pierce, H. Winthrop
- Pigal, Edme-Jean
- Pinwell, George John
- Pissarro, Lucien
- Plüddemann, Hermann Freihold
- Poidevin, Aline
- Portch, Julian
- Potter, Beatrix
- Poyet, Louis
- Pratt, Henry Lark
- Prout, Samuel
- Provost, A.
- Pugin, Augustus
- Purser, William
- Pyle, Howard
- Rackham, Arthur
- Raffet, Denis Auguste Marie
- Raphael
- Read, Samuel