- Aguilar, Jorge de.1
- Aikman, George, engraver1
- Air Navigation Aids Co1
- Aitken, Robert, 1735-18021
- Aitoff, D1
- Akademii︠a︡ nauk SSSR2
- Alaska Communication System1
- Alaska Geographic Society1
- Albernaz, João Teixeira, active 1665-16811
- Alberta, Northern1
- Alberta. Dept. of Public Works1
- Alberta. Dept. of Tourism1
- Alcalá-Galiano, Dionisio, 1760-18052
- Alden, Edward C1
- Alden, James, 1810-18772
- Alexander, W. D. (William De Witt), 1833-1913, cartographer1
- Alexius Kiessling (Firm)2
- Algermissen, Johann Ludwig1
- Allan Cartography (Firm)1
- Allard, Carel, 1648-ca. 17091