- U.S. Department of Commerce, National Oceanic and Atmospheric Administration, National Ocean Survey (1)
- U.S. Naval Oceanographic Office (20)
- U.S. Navy Hydrographic Office (16)
- USAF Aeronautical Chart and Information Center (6)
- USAF Aeronautical Chart and Information Service (6)
- USSR. Ministry of Geology. (1)
- United States Department of the Interior Geological Survey (15)
- United States Department of the Interior. United States Geological Survey. (1)
- Unstated (5)
- Unstated (Map Branch, CIA) (1)
- Unstated - Stamp reads "Branch of Special Maps, U.S. Geological Survey" (1)