1850 Atlas
| Name | What | Place | Pop | Other |
| Caraway | PO | Randolph Co, NC | ||
| Carbondale | PV | Luzerne Co, PA | water by Lackawana creek | |
| Cardiff | PV | Lafayette Twp, Onondaga Co, NY | ||
| Cardiff | PO | Warren Co, MS | ||
| Cardington | PV | Morven twp, Morrow Co, OH | 1,398 | |
| Carrey | PO | Wyandott Co, OH | ||
| Carlile's Mills | PO | Perry Co, MS | ||
| Carlinville | PV, CH | Macoupin Co, IL | seat of justice, water by Lake Fork of Macoupin river | |
| Carlisle | PT | Middlesex Co, MA | 632 | water by Concord river |
| Carlisle | PT | Schoharie Co, NY | 1,817 | |
| Carlisle | PV, CH | Cumberland Co, PA | 4,581 | seat of justice, seat of Dickson college |
| Carlisle | PV, CH | Troup Co, GA | seat of justice, water by Flat Shoal creek | |
| Carlisle | PV, CH | Nichols Co, KY | seat of justice, water by a branch of Licking river | |
| Carlisle | T | Lorain Co, OH | 1,512 | water by Black river |
| Carlisle | PV | Sullivan Co, IN | ||
| Carlisle | PO | Eaton Co, MI | ||
| Carlisle Springs | PO | Cumberland Co, PA | ||
| Carlo | PO | Hopkins Co, KY | ||
| Carlockville | PO | Rutherford Co, TN | ||
| Carlowsville | PO | Dallas Co, AL | ||
| Carlton | PT | Orleans Co, NY | 2,809 | water by Oak Orchard creek & LakeOntario |
| Carlton's Store | PO | Kings and Queen Co, VA | ||
| Carlyle | PV, CH | Clinton Co, IL | seat of justice, water by Kaskaskia river | |
| Carmel | PT | Penobscot Co, ME | 1,255 | water by Sowadabscook river |
| Carmel | PV, CH | Putnam Co, NY | 2,442 | seat of justice |
| Carmel | V | St Joseph Co, IN | ||
| Carmel | PV | Hamilton Co, IN | ||
| Carmel | T | Eaton Co, MI | 567 | |
| Carmel Hill | PO | Chester dist, SC | ||
| Carmi | PV, CH | White Co, IL | seat of justice, water by Little Wabash river | |
| Carmichaels | PO | Green Co, PA | ||
| Carnent Prairie | PO | Perry Co, IL | ||
| Carnesville | PV, CH | Franklin Co, GA | seat of justice, water by Stephen's Creek | |
| Carolina | PO | Haywood Co, TN | ||
| Carolina Female College | PO | Anson Co, NC | ||
| Caroline | PT | Tompkins Co, NY | 2,537 | water by West Oswego & Six Mile Creeks |
| Caroline Centre | PO | Caroline Twp, Tompkins Co, BY | ||
| Caroline Furnace | PO | Perry Co, PA | ||
| Caroline Mills | PO | Washington Co, RI | ||
| Carondelet | PV | St Louis Co, MO | water by Mississippi river | |
| Carpenter's Creek | PO | Jasper Co, IN | ||
| Carpenter's Mills | PO | Allen Co, KY | ||
| Carpenter's Landing | PV | Greenwich twp, Gloucester Co, NJ | water by Mantua creek | |
| Carp River | PO | Marquette Co, MI | ||
| Carr | PO | Jasper Co, IA | ||
| Carribou | PO | Aroostook Co, ME | ||
| Carrick | PO | Franklin Co, PA | ||
| Carritune | PV | Somerset Co, ME | ||
| Carroll | PO | Penobscot Co, ME | ||
| Carroll | PT | Coos Co, NH | ||
| Carroll | PT | Chautauque Co, NY | 1,833 | water by Conewango & Stillwater creeks |
| Carroll | T | York Co, PA | 807 | |
| Carroll | T | Washington Co, PA | 1,469 | |
| Carroll | T | Cambria Co PA | 1,129 | |
| Carroll | T | Perry Co, PA | ||
| Carroll | PO | Fairfield Co, OH | ||
| Carroll | T | Ottawa Co, OH | 403 | |
| Carroll | PO | Calhoun Co, MI | ||
| Carroll | PV | Carrol Co, IN | 665 | water by Wabash river |
| Carroll House | PO | Coos Co, NH | ||
| Carrollsville | PV | Tishamingo Co, MS | ||
| Carrolton | PV, CH | Centre twp, Carroll Co, OH | 865 | seat of justice |
| Carrollton | PV, CH | Carroll Co, KY | seat of justice, water by Ohio & Kentucky rivers | |
| Carrollton | PV, CH | Carroll Co, GA | seat of justice, water by south fork of Tallapoosa river | |
| Carrollton | PV, CH | Pickens Co, AL | seat of justice, water by Lubbub creek | |
| Carrollton | PV, CH | Carroll Co, MS | seat of justice, water by Big Sandy creek | |
| Carrollton | PO | Jefferson parish, LA | ||
| Carrollton | PV, CH | Carroll Co, AR | seat of justice, water by Crooked creek | |
| Carrollton | PV, CH | Greene Co, IL | 787 | seat of justice |
| Carrollton | PV, CH | Carroll Co, MO | water by Waconda creek | |
| Carrollton | PV, CH | Centre twp, Carroll Co, OH | seat of justice | |
| Carrollton | PO | Cambria Co, PA | ||
| Carrollville | PV | Wayne Co, TN | ||
| Carrsville | PO | Isle of Wright Co, VA | ||
| Carrsville | PO | Cooper Co, MO | ||
| Carryall | T | Paulding Co, OH | 387 | |
| Carson's Creek | PO | Calaveras Co, CA | ||
| Carsonsville | PV | Talbot Co, GA | ||
| Carter Camp | PO | Potter Co, PA | ||
| Carter's Bridge | PO | Albeniarle Co, VA | ||
| Carter's Creek | PO | Williamson Co, TN | ||
| Carter's Hill | PO | MOntgomery Co, AL | ||
| Carter's Station | PO | Greene Co, TN | ||
| Carter's Store | PO | Nicholas Co, KY | ||
| Cartersville | PT | Oswego Co, NY | water by Salmon & Serbia creeks | |
| Cartersville | PV | Cumberland Co, VA | water by James river | |
| Cartersville | PO | Cass Co, GA | ||
| Cartersville | PO | Tishomingo Co, MS | ||
| Cartersville | PO | Darlington Co, SC | ||
| Carthage | PT | Franklin Co, ME | 420 | water by Webb's river |
| Carthage | PV | Wilna twp, Jefferson Co, NY | water by Black river | |
| Carthage | PV | Mill Creek twp, Hamilton Co, no state | SW of Columbus | |
| Carthage | PO | Campbell Co, KY | ||
| Carthage | PV, CH | Moore Co, NC | seat of justice, water by McLennon's creek | |
| Carthage | PV | Tuscaloosa Co, AL | ||
| Carthage | PV, CH | Leake Co, MS | seat of justice | |
| Carthage | PV, CH | Smith Co, TN | seat of justice, water by Cumberland river | |
| Carthage | T | Athens Co, OH | 1,087 | |
| Carthage | PV | Rush Co, IN | ||
| Carthage | V | Brighton twp, Monroe Co, NY | water by Genesee river | |
| Carthage | PO | Franklin Co, ME | ||
| Carthage | PV, CH | Hancock Co, IL | seat of justice, water by Mississippi river | |
| Carthage | PV, CH | Jasper Co, MO | seat of justice | |
| Carthage | PV, CH | Panola Co, TX | seat of justice | |
| Carthage Landing | PO | Dutchess Co, NY | ||
| Carticay | PO | Gilmer Co, GA | ||
| Carver | PT | Plymouth Co, MA | 1,186 | |
| Carver's Harbor | PO | Waldo Co, ME | ||
| Carversville | PO | Bucks Co, PA | ||
| Carverton | PO | Luzerne Co, PA | ||
| Carysville | PO | Champaign Co, OH | ||
| Cascade | PO | Pittsylvania Co, PA | ||
| Cascade | PO | Sheboygan Co, WI | ||
| Cascade | PO | Dubuque Co, IA | ||
| Casco | PO | Cumberland Co, ME | ||
| Caseville | PV | Olive twp, Ulster Co, NY | ||
| Casey | PO | Clark Co, IL | ||
| Caseyville | PO | Union Co, KY | ||
| Casher's Valley | PO | Macon Co, NC | ||
| Cash's Nob | PO | Montgomery Co, KY | ||
| Cashtown | PV | Adams Co, PA | ||
| Cashville | PV | Spartanburg dist, SC | ||
| Casnovia | PO | Ottawa Co, MI | ||
| Cass | PT | Hancock Co, OH | 621 | |
| Cass | T | Ionia Co, MI | ||
| Cass | PO | Tippecanoe Co, IN | ||
| Cass | PO | Venango Co, PA | ||
| Cass | PO | Du Page Co, IL | ||
| Cass | PO | Hillsdale Co, MI | ||
| Cass | PO | Franklin Co, AR | ||
| Cass | PO | Lawrence Co, TN | ||
| Cassadaga | PO | Pomfret twp, Chautauque Co, NY | ||
| Cassapolis | PV, CH | Cass Co, MI | seat of justice | |
| Cassity's Mills | PO | Morgan Co, KY | ||
| Casstown | PO | Miami Co, OH | ||
| Cassville | PO | Harrison Co, OH | ||
| Cassvile | PO | Barry Co, MO | ||
| Cassville | PO | Huntingdon Co, PA | ||
| Cassville | PO | Monongalia Co, VA | ||
| Cassville | PV | Paris twp, Oneida Co, NY | water by Sauquoit creek | |
| Cassville | PO | Monmouth Co, NJ | ||
| Cassville | PV, CH | Cass Co, GA | seat of justice | |
| Cassville | PV | Grant Co, WI | water by Mississippi river | |
| Castalia | PO | Erie Co, OH | ||
| Castalian Springs | PO | Sumner Co, TN | ||
| Castile | PT | Wyoming Co, NY | 2,446 | Genesee river & Silver lake |
| Castile | PO | Greene Co, PA | ||
| Castile | PO | Clinton Co, MO | ||
| Castine | PT, CH | Hancock Co, ME | 1,260 | seat of justice, water by Penobscot bay |
| Castine | PO | Darke Co, OH | ||
| Castle Craig | PO | Campbell Co, VA | ||
| Castle Creek | PO | Broome Co, NY | ||
| Castlefin | PO | Tork co, PA | ||
| Castlefin | PO | Jefferson Co, IL | ||
| Castle Grove | PO | Jones Co, IA | ||
| Castleman's Ferry | PO | Clarke Co, VA | ||
| Castleton | PT | Rutland Co, VT | 3,016 | water by Castleton river |
| Castleton | PV | Schodack twp, Rennselacer Co, NY | water by Hudson river | |
| Castleton | T | Richmond Co, Staten Island, NY | 5,389 | |
| Castleton | PO | Barry Co, MI | ||
| Castor | T | Madison Co, MO | ||
| Castor | PO | Caldwell parish, LA | ||
| Caswell | PO | Lafayette Co, MO |