| California, US (598 K) |
| Cairo, Egypt (42 K) |
| Calgary, Canada (29 K) |
| Cambridge, England (9 K) |
| Canada (228 K) |
| Canberra, Australia (6 K) |
| Canton, MA (11 K) |
| Cape Town, South Africa (10 K) |
| Caracas, Venezuela (122 K) |
| Caribbean (6 K) |
| Champaign, IL (7 K) |
| Charleston, IL (21 K) |
| Charlotte, NC (36 K) |
| Charlottesville, VA (9 K) |
| Chattanooga, TN (9 K) |
| Chicago, IL (128 K) |
| Chile (6 K) |
| China (78 K) |
| Cincinnati, OH (16 K) |
| Claire, WI (6 K) |
| Clearfield, UT (3 K) |
| Cleveland, Ohio (34 K) |
| Colorado, US (78 K) |
| College, PA (13 K) |
| Cologne, Germany (12 K) |
| Colombia (15 K) |
| Columbia, MO (30 K) |
| Columbus, MS (44 K) |
| Concord, NH (11 K) |
| Connecticut, US (62 K) |
| Conway, AR (6 K) |
| Copenhagen, Denmark (12 K) |
| Corvallis, OR (5 K) |
