| Zipcode | Community | City | State | Metro Area |
|---|---|---|---|---|
| 00735 | Ceiba | Ceiba | Puerto Rico | San Juan-Carolina-Caguas PR |
| 00742 | Ceiba | Roosevelt roads | Puerto Rico | San Juan-Carolina-Caguas PR |
| 00926 | Cupey | San juan | Puerto Rico | San Juan-Carolina-Caguas PR |
| 01013 | Chicopee | Chicopee | Massachusetts | Springfield MA |
| 01014 | Chicopee | Chicopee | Massachusetts | Springfield MA |
| 01020 | Chicopee | Chicopee | Massachusetts | Springfield MA |
| 01021 | Chicopee | Chicopee | Massachusetts | Springfield MA |
| 01022 | Chicopee | Chicopee | Massachusetts | Springfield MA |
| 06807 | Cos cob | Cos cob | Connecticut | Bridgeport-Stamford-Norwalk CT |
| 13623 | Chippewa bay | Chippewa bay | New York | Ogdensburg-Massena NY |
| 17020 | Cove | Duncannon | Pennsylvania | Harrisburg-Carlisle PA |
| 29038 | Cope | Cope | South Carolina | Orangeburg SC |
| 29404 | Chas afb | Charleston afb | South Carolina | Charleston-North Charleston SC |
| 31735 | Cobb | Cobb | Georgia | Americus GA |
| 36907 | Cuba | Cuba | Alabama | |
| 38053 | Cuba | Millington | Tennessee | Memphis TN-MS-AR |
| 38863 | Chiwapa | Pontotoc | Mississippi | Tupelo MS |
| 41011 | Cov | Covington | Kentucky | Cincinnati OH-KY-IN |
| 45114 | Cuba | Cuba | Ohio | Wilmington OH |
| 53526 | Cobb | Cobb | Wisconsin | Madison WI |
| 57552 | Capa | Midland | South Dakota | |
| 58079 | Chaffee | Wheatland | North Dakota | Fargo ND-MN |
| 61427 | Cuba | Cuba | Illinois | Canton IL |
| 62890 | Cave | Thompsonville | Illinois | |
| 63740 | Chaffee | Chaffee | Missouri | Sikeston MO |
| 63965 | Chicopee | Van buren | Missouri | |
| 64436 | Cosby | Cosby | Missouri | St. Joseph MO-KS |
| 64636 | Coffey | Coffey | Missouri | |
| 65453 | Cuba | Cuba | Missouri | |
| 66940 | Cuba | Cuba | Kansas | |
| 71937 | Cove | Cove | Arkansas | |
| 77523 | Cove | Baytown | Texas | Houston-The Woodlands-Sugar Land TX |
| 79223 | Cee vee | Cee vee | Texas | |
| 80812 | Cope | Cope | Colorado | |
| 84320 | Cove | Lewiston | Utah | Logan UT-ID |
| 87013 | Cuba | Cuba | New Mexico | Albuquerque NM |
| 95426 | Cobb | Cobb | California | Clearlake CA |
| 95607 | Capay | Capay | California | Sacramento--Roseville--Arden-Arcade CA |
| 97420 | Coos bay | Coos bay | Oregon | Coos Bay OR |
| 97824 | Cove | Cove | Oregon | La Grande OR |