- Homann, Johann Baptist, 1663-17241
- Ibañez e Ibañez de Ibero, Carlos, 1825-18911
- Imprimerie Grou-Radenez1
- International Society of Soil Science1
- Irish Tourist Association1
- Istituto geografico De Agostini1
- Istituto italiano d'arti grafiche (Bergamo, Italy)1
- J. & C. Walker (Firm)1
- Jagen, Jan van1
- Jaillot, Alexis Hubert, 1632?-17121
- Jansson, Jan, 1588-16641
- Jentzsch, Alfred, 1850-19251
- John Bartholomew and Son1
- Jonasson, Olof Georg, 1894-19651
- Kartografiska institutet, AB.1
- Kennet and Avon Canal Company1
- Kenyon Company (Des Moines, Iowa)1
- Lapie, M. (Pierre), 1779-18501
- Larcom, Thomas A. (Thomas Aiskew), 1801-18791
- Laurie, Richard Holmes1