- K. Wildeis (1)
- Kansa, a blend of several metals is frequently used in the Jain and Muslim communities (1)
- Karl Weinbrenner & Sohne (1)
- Karoly Kampmann (3)
- Kartogr. Abteilung der Kgl. Preuss. Landesaufnahme (Prussia) (1)
- Kartograficheskoe (V S. Peterburgi︠e︡ [St. Petersburg, Russia) (1)
- Kartopechatnoi? Masterskoi? Instituta Inzhenerov (Moscow?) (1)
- Kasedaya Hiemon ... [and 5 others] (Wakayama, Japan) (1)
- Katsumura Jiuemon (Kyōto) (3)
- Kawachiya Mohē ... and 8 others (Ōsaka) (1)
- Keen and Lee (Chicago) (1)
- Keith Prowse & Co.. LTD. (London) (1)
- Kelly & Co. Post Office (London) (1)
- Kentucky Geological Survey (Frankfort, Ky) (1)
- Kenyon Co (Des Moines, Iowa) (1)
- Kenyon Co (Des Moines, Iowa), 1915 (1)
- Kenyon Co. (Des Moines, Iowa), 1912 (1)
- Kenyon Co. Map Makers (Des Moines, Iowa), 1915 (1)
- Kenyon Co. Map Makers (Des Moines, Iowa), 1916 (1)
- Kenyon Co., Inc., Map Makers (Des Moines, Iowa), 1923 (1)
