- Huebinger Surveying and Map Publishing Co.2
- Humphreys, A. A. (Andrew Atkinson), 1810-18832
- Humphreys, A. A. (Andrew Atkinson), 1810-1883, director2
- I.T. Hinton & Simpkin & Marshall.2
- Ikeda, Tōri2
- Ikola, R.J.2
- India. Surveyor General2
- Iowa Geological Survey.2
- Iowa State College. Department of Civil Engineering2
- Iowa. Highway Commission.2
- Iowa. State Planning Board. Business Research Committee2
- Iowa. State Planning Board. Committee on Business and Industry2
- Iowa. State Planning Board. Committee on Forests & Wasteland2
- Iowa. State Planning Board. Committee on Rural, Secondary, & Adult Education Survey2
- Iowa. State Planning Board. Transportation Committee2
- Isaacs, Patricia2
- Istituto geografico De Agostini2
- Ives, J. C., explorer2
- J. & G. Menzies.2
- Japan. Rikugun. Sanbō Honbu2