- Canada Centre for Mapping2
- Canada Centre for Remote Sensing8
- Carey, Mathew, 1760-18391
- Cary, John, ca. 1754-18354
- Catlos, Elizabeth1
- Center for Habitat Studies, Moss Landing Marine Laboratories2
- Center for Spatial and Textual Analysis2
- Centre de recherche géographique et de production cartographique (Brazzaville, Congo)18
- Centro Nacional de Cartografia e Teledetecção (Mozambique)9
- Centro Nacional de Registros (El Salvador)9
- Cheffins, Charles F.1
- Chevalier, August, 1871-1
- Chin, John L.3
- Church, Ian2
- Churchman, Joseph and James1
- Ciampi, Mario J. (Mario Joseph), 1907-20063
- City Planning1
- City and County of San Francisco6
- City and County of San Francisco 1
- City and County of San Francisco- Technology 1
