- A. and W. Galignani (Firm)1
- A. and W. Galignani and Co.1
- A.S. Barnes & Co.1
- Abbot, E. T. (Civil engineer)1
- Abbott, E. T. (Edward T.), 1847-19381
- Abe, Rekisai1
- Abert, J. W. (James William), 1820-18971
- Abert, John James, 1788-18631
- Académie des sciences (France)1
- Achin1
- Ackermann and Co.1
- Adams, Henry, Captain1
- Adams, J. E. (James Edward), 1898-1
- Adept Map Co.1
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- Agas, Ralph, 1545-16211
- Agnus aîné, publisher1
- Ahlgrim, M. J., cartographer.1
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- Akerson, E. A1