1850 Atlas
| Name | What | Place | Pop | Other |
| Clear Branch | PO | Washington Co, VA | ||
| Clear Creek | PV | Ellington twp, Chautauque Co, NY | ||
| Clear Creek | PO | Mecklenburgh Co, NC | ||
| Clear Creek | PO | Daviess Co, MO | ||
| Clear Creek | PO | Greene Co, TN | ||
| Clear Creek | PT | Fairfield Co, OH | 1,606 | |
| Clear Creek | T | Warren Co, OH | 2,770 | |
| Clear Creek | T | Richland Co, OH | ||
| Clear Creek Landing | PV | Alexander Co, IL | ||
| Clearfield | PV, CH | Clearfield Co, PA | 503 | seat of justice, water by west branch of Susquehanna river |
| Clearfield | T | Butler Co, PA | 1,924 | |
| Clearfield | T | Cambria Co, PA | 802 | |
| Clearfield Bridge | PO | Clearfield Co, PA | ||
| Clear Fork | PO | Tazewell Co, VA | ||
| Clear Fork | PO | Whitley Co, KY | ||
| Clear Fork Mills | PO | Johnson Co, MO | ||
| Clear Lake | PO | Sangamon Co, IL | ||
| Clearmont | PO | Warren Co, TN | ||
| Clearpoint | PO | Hart Co, KY | ||
| Clear Spring | PV | Washington Co, IN | ||
| Clear Spring | T | La Grange Co, IN | 674 | |
| Clear Spring | PO | Kosciusko Co, IN | ||
| Clear Spring | PO | Greenville dist, SC | ||
| Clear Spring | PO | Chickasaw Co, MS | ||
| Clear Spring | PO | Grainger Co, TN | ||
| Clearsville | PO | Bedford Co, PA | ||
| Clear Water | PO | Chipewa Co, WI | ||
| Cleaveland | PO | Oswego Co, NY | ||
| Cleaveland | PV, CH | Bradley Co, TN | seat of justice | |
| Clement | PO | Hancock Co, OH | ||
| Clementsville | PO | Jackson Co, TN | ||
| Clemmonsville | PV | Davidson Co, NC | ||
| Clendenin | PO | Kanawha Co, VA | ||
| Clermont | PT | Columbia Co, NY | 1,130 | water by Hudson river & Aneram creek |
| Clermont | PO | Marion Co, IN | ||
| Clermont | PO | Richland Co, IL | ||
| Clermont | PO | Fayette Co, IA | ||
| Clermont Mills | PO | Harford Co, MD | ||
| Clermontville | PO | McKean Co, PA | ||
| Cleveland | PV | Constantia twp, Oswego Co, NY | water by Oneida lake | |
| Cleveland | City | Cuyahoga Co, OH | 25,670 | seat of justice |
| Cleveland | V | Merriwether Co, GA | ||
| Cleves | PV | Miami twp, Hamilton Co, OH | 251 | water by Big Miami river |
| Clifford | PT | Susquehanna Co, PA | 1,353 | |
| Clift Mills | PO | Fauquier Co, VA | ||
| Clifton | PV | Miami twp, Greene Co, OH | water by Little Miami river | |
| Clifton | PO | Luzerne Co, PA | ||
| Clifton | V | Russell Co, VA | water by Maiden Spring fork | |
| Clifton | PO | Penobscot Co, ME | ||
| Clifton | PO | King George Co, VA | ||
| Clifton | blank | Monroe Co, NY | ||
| Clifton | PO | Wayne Co, TN | ||
| Clifton Factory | V | St Mary's Co, MD | ||
| Clifton Forge | PO | Alleghany Co, VA | ||
| Clifton Mills | PO | Breckenridge Co, KY | ||
| Clifton Park | PT | Saratoga Co, NY | 2,868 | water by Mohawk river |
| Clifton Springs | PO | Ontario Co, NY | ||
| Clifty | PO | Decatur Co, IN | ||
| Clifty | T | Bartholomew Co, IN | 946 | |
| Clifty | PO | Todd Co, KY | ||
| Climax Prairie | PO | Kalamazoo Co, MI | ||
| Clinch | T | Van Buren Co, MI | ||
| Cline's Mill | PO | Augusta Co, VA | ||
| Clingman | PO | Cleveland Co, NC | ||
| Clinton | PT | Kennebec Co, ME | 1,743 | water by Kennebec & Sebasticook rivers |
| Clinton | PT | Middlesex Co, CT | 1,344 | |
| Clinton | T | Dutchess Co, NY | 1,795 | |
| Clinton | PV | Kirkland twp, Oneida Co, NY | water by Oriskany creek | |
| Clinton | PV | Hunterdon Co, NJ | 2,368 | water by Raritan river |
| Clinton | T | Essex Co, NJ | 2,508 | |
| Clinton | PV | Alleghany Co, PA | ||
| Clinton | T | Wayne Co, PA | 840 | |
| Clinton | T | Lycoming Co, PA | 850 | water by west branch Susquehanna river |
| Clinton | PT | Summit Co, OH | water by Indian creek | |
| Clinton | PV | Tecumseh twp, Lenawee Co, MI | water by north branch Raisin river | |
| Clinton | PV, CH | Jones Co, GA | seat of justice | |
| Clinton | PV | Hickman Co, KY | water by Bayou Desbia | |
| Clinton | PV, CH | Sampson Co, NC | seat of justice, water by Black river | |
| Clinton | PV | Greene Co, AL | ||
| Clinton | PV | Hinds Co, MS | seat of Mississippi College | |
| Clinton | PV | East Feliciana parish, LA | ||
| Clinton | PV | Van Buren Co, AR | water by Little Red river | |
| Clinton | PV, CH | Anderson Co, TN | seat of justice, water by Clinch river | |
| Clinton | PT | Vermilion Co, IN | 1,509 | water by Wabash river |
| Clinton | PV | Dewitt Co, IL | water by Salt creek | |
| Clinton | T | Macomb Co, MI | 2,130 | water by Lake St Clair |
| Clinton | T | Franklin Co, OH | 1,186 | |
| Clinton | T | Putnam Co, IN | ||
| Clinton | T | Lucas Co, OH | ||
| Clinton | V, CH | Rives Co, MO | seat of justice, water by Grand river | |
| Clinton | PT | Jackson Co, OH | ||
| Clinton | T | Seneca Co, OH | 1,680 | |
| Clinton | T | Shelby Co, OH | 764 | |
| Clinton | T | Wayne Co, OH | 1,121 | |
| Clinton | PT | Knox Co, OH | 802 | |
| Clinton | PO | Worcester Co, MA | ||
| Clinton | PO | Henry Co, MO | ||
| Clinton | PO | Dewitt Co, TX | ||
| Clinton College | PV | Smith Co, TN | ||
| Clinton Corners | PO | Dutchess Co, NY | ||
| Clintondale | PO | Ulster Co, NY | ||
| Clinton Furnace | PO | Clarion Co, PA | ||
| Clinton Gore | PO | Kennebec Co, ME | ||
| Clinton Hollow | PO | Clinton twp, Dutchess Co, NY | ||
| Clintonville | PV | Au Sable twp, Clinton Co, NY | water by Au Sable river & Lake Champlain | |
| Clintonville | PV | Vennango Co, PA | ||
| Clintonville | PV | Greenbrier Co, VA | ||
| Clintonville | PV | Bourbon Co, KY | ||
| Clintonville | PO | Franklin Co, OH | ||
| Clintonville | PO | Kane Co, IL | ||
| Clio | PV | Marlborough dist, SC | ||
| Clio | PO | Wayne Co, KY | ||
| Clio | PO | Greene Co, OH | ||
| Clockville | PV | Lenox twp, Madison Co, NY | ||
| Clokey | PO | Washington Co, PA | ||
| Clopton's Mills | PO | Putnam Co, GA | ||
| Cloutierville | PV | Natchitoches parish, LA | ||
| Clove | PO | Unionvale twp, Dutchess Co, NY | ||
| Clove | PO | Wantage twp, Sussex Co, NJ | ||
| Clover | PO | Clermont Co, OH | ||
| Clover | PO | Blair Co, PA | ||
| Clover Bend | PO | Lawrence Co, AR | ||
| Clover Bottom | PO | Sullivan Co, TN | ||
| Clover Creek | PO | Highland Co, VA | ||
| Clover Dale | PO | Botetourt Co, VA | ||
| Clover Dale | PO | Putnam Co, IN | ||
| Clover Garden | PO | Orange Co, NC | ||
| Clover Green | PO | Spotsylvania Co, VA | ||
| Clover Hill | PO | Hunterdon Co, NJ | ||
| Clover Hill | PO | Blount Co, TN | ||
| Clover Hill | PV, CH | Appomattox Co, VA | ||
| Clover Hill | PO | Green Co, KY | ||
| Cloverdale Hotel | PO | Bath Co, VA | ||
| Cloverland | PO | Clay Co, IN | ||
| Clover Orchard | PO | Orange Co, NC | ||
| Cloverport | PV | Breckenridge Co, KY | water by Ohio & Clover rivers | |
| Cloverport | PO | Hardeman Co, TN | ||
| Cloves Depot | PO | Oldham Co, KY | ||
| Cloyd's Creek | PO | Blount Co, TN | ||
| Clyaattsville | PO | Lowndes Co, GA | ||
| Clyde | PV | Glen twp, Wayne Co, NY | water by Clyde river & Erie canal | |
| Clyde | PO | Whiteside Co, IL | ||
| Clyde Mills | PO | Clyde twp, St Clair Co, MI | water by Black river | |
| Clyman | PO | Dodge Co, MI | ||
| Clymer | PT | Chautauque Co, NY | 1,127 | water by Broken Straw creek |
| Clymer Centre | PO | Clymer twp, Chautauque Co, NY |