| State Name | County Name | City |
|---|---|---|
| Puerto Rico | Salinas | Coco |
| Michigan | Oakland | Clawson |
| Georgia | Evans | Claxton |
| Alabama | Jefferson | Clay |
| New York | Onondaga | Clay |
| Pennsylvania | Lancaster | Clay |
| Kansas | Clay | Clay Center |
| Alabama | Barbour | Clayton |
| California | Contra Costa | Clayton |
| Delaware | Kent | Clayton |
| Georgia | Rabun | Clayton |
| Missouri | St. Louis | Clayton |
| North Carolina | Johnston | Clayton |
| New Jersey | Gloucester | Clayton |
| New York | Jefferson | Clayton |
| Ohio | Montgomery | Clayton |
| Washington | Kittitas | Cle Elum |
| Iowa | Cerro Gordo | Clear Lake |
| Pennsylvania | Clearfield | Clearfield |
| Utah | Davis | Clearfield |
| California | Lake | Clearlake |
| California | Lake | Clearlake Riviera |
| Washington | Snohomish | Clearview |
| South Carolina | Aiken | Clearwater |
| Texas | Johnson | Cleburne |
| New Jersey | Camden | Clementon |
| North Carolina | Forsyth | Clemmons |
| South Carolina | Pickens | Clemson |
| Florida | Lake | Clermont |
| Florida | Charlotte | Cleveland |
| Georgia | White | Cleveland |
| Mississippi | Bolivar | Cleveland |
| Ohio | Cuyahoga | Cleveland |
| Oklahoma | Pawnee | Cleveland |
| Tennessee | Bradley | Cleveland |
| Texas | Liberty | Cleveland |
| Ohio | Cuyahoga | Cleveland Heights |
| Ohio | Hamilton | Cleves |
| Florida | Hendry | Clewiston |
| New Jersey | Bergen | Cliffside Park |
| New Jersey | Monmouth | Cliffwood Beach |
| Arizona | Greenlee | Clifton |
| Colorado | Mesa | Clifton |
| New Jersey | Passaic | Clifton |
| Texas | Bosque | Clifton |
| Virginia | Alleghany | Clifton Forge |
| Pennsylvania | Delaware | Clifton Heights |
| New York | Saratoga | Clifton Park |
| New York | Ontario | Clifton Springs |
| Connecticut | Middlesex | Clinton |
| Iowa | Clinton | Clinton |
| Illinois | De Witt | Clinton |
| Indiana | Vermillion | Clinton |
| Massachusetts | Worcester | Clinton |
| Maryland | Prince George's | Clinton |
| Maine | Kennebec | Clinton |
| Missouri | Henry | Clinton |
| Mississippi | Hinds | Clinton |
| North Carolina | Sampson | Clinton |
| New Jersey | Hunterdon | Clinton |
| New York | Dutchess | Clinton |
| Oklahoma | Custer | Clinton |
| Pennsylvania | Lycoming | Clinton - Lycoming |
| Pennsylvania | Butler | Clinton - Butler |
| South Carolina | Laurens | Clinton |
| Tennessee | Anderson | Clinton |
| Utah | Davis | Clinton |
| Wisconsin | Waupaca | Clintonville |
| Iowa | Polk | Clive |
| Minnesota | Carlton | Cloquet |
| New Jersey | Bergen | Closter |
| South Carolina | York | Clover |
| California | Sonoma | Cloverdale |
| Virginia | Botetourt | Cloverdale |
| Texas | Harris | Cloverleaf |
| Maryland | Montgomery | Cloverly |
| California | Fresno | Clovis |
| New Mexico | Curry | Clovis |
| Texas | Brazoria | Clute |
| Ohio | Sandusky | Clyde |
| Texas | Callahan | Clyde |
| Washington | King | Clyde Hill |
| California | Riverside | Coachella |
| Pennsylvania | Northumberland | Coal |
| Illinois | Grundy | Coal City |
| Illinois | Rock Island | Coal Valley |
| California | Fresno | Coalinga |
| Pennsylvania | Chester | Coatesville |
| New York | Schoharie | Cobleskill |
| Massachusetts | Middlesex | Cochituate |
| Georgia | Bleckley | Cochran |
| Maryland | Baltimore | Cockeysville |
| Texas | Dallas | Cockrell Hill |
| Florida | Brevard | Cocoa |
| Florida | Brevard | Cocoa Beach |
| Florida | Brevard | Cocoa West |
| Delaware | New Castle | Claymont |
| New Jersey | Middlesex | Clearbrook Park |
| Washington | Pierce | Clover Creek |
| Puerto Rico | Coamo | Coamo |
