- Foster, J. W. (John Wells), 1815-18731
- Frelich, Lee E.1
- G.W. & C.B. Colton & Co.1
- G.W. Boynton & Co1
- Gaston, S.A.1
- Geil & Harley1
- Geil and Jones1
- Geil, John F., cartographer1
- Geil, Samuel, publisher1
- General Telephone Company of Michigan1
- Genesee County Parks & Recreation Commission (Genesee County, Mich.)1
- Geographical Publishing Co.1
- Geological Survey Division1
- George F. Cram Company1
- George Wahr (Firm)1
- George Wahr Publishing Company.1
- Gibson, Ben S.1
- Gladwin County Chamber of Commerce1
- Gogebic County Board of Supervisors1
- Gould, Harold D.1