Creator
- Northrop Drug Store (Pass Christian, Miss.)1
- Northrop, Claudian Bird, 1812-1865.1
- Northrop, Lucius Bellinger, 1811-18941
- Norton, Chauncey S.1
- Norton, Oliver Wilcox, 1839-1920.1
- Norwood Souvenir Co.1
- Novelty Photo Studio (Peoria, Ill.)1
- Novelty Post Card Co. (Kansas City, Mo.)1
- Novelty Studio (Seattle, Wash.)1
- Novelty Trading Co. (Kingston, Jamaica)1
- Nowell, F. A.1
- Nowell, Tom1
- Nriemkem1
- O Studio.1
- O'Connell, George Francis, 1886-1
- O'Kelly, F. C.1
- O'Kelly-Cooke, Amorel E.1
- O'Neall Specialty Co. (McAllen, Tex.)1
- O'Neil, Bill.1
- O'Rell, Max, 1848-1903.1