C
- Cabot, Vermont – named by settler Lyman Hitchcock for his intended bride
- Cadenasso, California – Nicolo Cadenasso (early settler)
- Camden, Maine – Charles Pratt, 1st Earl Camden
- Cameron, California – George W. Cameron (early settler)
- Cameron, Missouri – Malinda Cameron (maiden name of wife of Samuel McCorkle, who platted the town of Somerville, Missouri)
- Camillus, New York – Marcus Furius Camillus (Roman military leader)
- Camp Connell, California – John F. Connell (landowner and first postmaster)
- Camp Douglas, Wisconsin – James Douglas (established a camp along the Milwaukee Road to provide wood for the locomotives)
- Camp Pardee, California – George Pardee (governor of California)
- Camp Richardson, California – Alonzo L. Richardson (first postmaster)
- Campbell, California – Benjamin Campbell (founder)
- Campbellsville, Kentucky – Andrew Campbell (founder)
- Campion, Colorado – John F. Campion (hard rock mine owner and established the sugar beet industry)
- Camptonville, California – Robert Campton (town blacksmith)
- Canby, California – General Edward Canby
- Canfield, California – Charles W. Canfield (founder)
- Canova, South Dakota – Antonio Canova (Italian sculptor)
- Canterbury, New Hampshire – William Wake, Archbishop of Canterbury
- Cape Elizabeth, Maine – Elizabeth of Bohemia (sister of King Charles I of England)
- Cape Girardeau, Missouri – Jean Baptiste de Girardot (French soldier)
- Carey, California – George R. Carey (first postmaster)
- Caribou, California – Johnny Caribou (early miner)
- Carlotta, California – Carlotta Vance (founder's daughter)
- Carolina, Rhode Island – Caroline Hazard (wife of Rowland G. Hazard, mill owner)
- Carr, Colorado – Robert E. Carr (managed the construction of the Union Pacific Railroad rail line through the town)
- Carroll, New Hampshire – Charles Carroll (a signer of the Declaration of Independence)
- Carroll Plantation, Maine – Daniel Carroll (a signer of the U.S. Constitution)
- Carson City, Nevada – Kit Carson
- Carson Hill, California – Sergeant James H. Carson
- Caruthers, California – W.A. Caruthers (local farmer)
- Carver, Massachusetts – John Carver (first Governor of Plymouth Colony)
- Caspar, California – Siegfried Caspar (founder)
- Casper, Wyoming – Lieutenant Caspar Collins (killed by a group of Indian warriors) (note spelling)
- Castine, Maine – Baron Jean-Vincent de St. Castin
- Castroville, California – Simeon Nepomuceno Castro (landowner)
- Catheys Valley, California – Andrew Cathey (early settler)
- Cavendish, Vermont – William Cavendish, 4th Duke of Devonshire
- Village of Cazenovia and the Town of Cazenovia, in New York – Theophilus Cazenove
- Chalfant Valley, California – Arthur Chalfant (newspaper publisher)
- Chamberlain, South Dakota – Selah Chamberlain (railroad director)
- Chambers Lodge, California – David H. Chambers (lodge builder)
- Chandler, Arizona – Dr. Alexander John Chandler
- Chanz, California – George A. Chanz (first postmaster)
- Chaplin, Connecticut – Deacon Benjamin Chaplin (early settler)
- Chardon, California – Charles Langdon (early settler)
- Charles Town, West Virginia – Charles Washington (founder; younger brother of George Washington)
- Charleston, Merced County, California – Charles Bambauer (first postmaster)
- Charleston, Yolo County, California – Charles H. Gray (first postmaster)
- Charleston, Maine – Charles Vaughan (settler)
- Charleston, South Carolina – King Charles II of England
- Charleston, West Virginia – Charles Clendenin (father of Colonel George Clendenin, a landholder who built Fort Lee here)
- Charlestown, New Hampshire – Admiral Sir Charles Knowles, 1st Baronet of the British Royal Navy
- Charlestown, Rhode Island – King Charles II of England
- Charlotte, Maine – Charlotte Vance (wife of legislator William Vance)
- Charlotte, North Carolina and Charlotte, Vermont – Charlotte of Mecklenburg-Strelitz (wife of King George III)
- Charlton, Massachusetts – Sir Francis Charlton
- Chatfield, Minnesota – Judge Andrew Chatfield
- Chatham, New Hampshire – William Pitt, 1st Earl of Chatham (Prime Minister of Great Britain)
- Cheneyville, Louisiana – William Cheney (settler)
- Chester, Vermont – George IV of the United Kingdom, the Earl of Chester (eldest son of George III of the United Kingdom)
- Chesterfield, Massachusetts – Earl of Chesterfield
- Chesterfield, New Hampshire – Philip Stanhope, 4th Earl of Chesterfield
- Chichester, New Hampshire – Thomas Pelham-Holles, 1st Duke of Newcastle-upon-Tyne, Earl of Chichester
- Chittenden, Vermont – Thomas Chittenden (one of the Green Mountain Boys and later governor)
- Cicero, Illinois – Cicero (indirectly, via Cicero, New York)
- Cicero, New York – Cicero
- Cincinnati, Ohio – Lucius Quinctius Cincinnatus (indirectly, via the Society of the Cincinnati)
- Christiana, Delaware – Queen Christina of Sweden
- Cisco, California – John J. Cisco (treasurer of the railroad)
- Cisco Grove, California – John J. Cisco (treasurer of the railroad)
- Claraville, California – Clara Munckton (first white woman there)
- Clarksburg, California – Robert C. Clark (early settler)
- Clarksburg, Massachusetts – Nicholas Clark (early settler)
- Clarkston, Washington – Governor William Clark
- Clarksville, Missouri – Governor William Clark
- Clay County, Florida – Henry Clay United States Secretary of State in the 19th century.
- Clayton, California – Joel Henry Clayton (founder)
- Clendenin, West Virginia – Charles Clendenin (father of Colonel George Clendenin)
- Cleveland, Ohio – Moses Cleaveland (note spelling)
- Cleveland, Tennessee – Colonel Benjamin Cleveland
- Cleveland, Texas – Charles Lander Cleveland (local judge)
- Cleveland, Manitowoc County, Wisconsin – Grover Cleveland
- Clinton, – DeWitt Clinton 16 places in
- Arkansas – Connecticut – Illinois – Indiana – Iowa – Louisiana – Maine – Massachusetts – Michigan – Minnesota – Mississippi – Missouri – New Jersey – New York (city and county) – Ohio – Wisconsin
- Clinton, Lassen County, California – DeWitt Clinton (indirectly, via Clinton, Maine, home town of its first postmaster)
- Clinton, Kansas – DeWitt Clinton (indirectly, via Clinton, Illinois)
- Clinton, Montana – General Sir Henry Clinton
- Clinton, Nebraska – DeWitt Clinton (indirectly, via Clinton, Iowa)
- Clinton, Dutchess County, New York – George Clinton (early governor of New York)
- Clinton, Oneida County, New York – George Clinton (early governor of New York)
- Clinton, North Carolina – American Revolution General Richard Clinton
- Clinton, Oklahoma – Clinton Irwin (territorial judge)
- Clinton, South Carolina – Henry Clinton Young (Laurens lawyer who helped lay out the first streets)
- Clinton, Washington – DeWitt Clinton (indirectly, via Clinton, Lenawee County, Michigan)
- Clovis, California – Clovis Cole (local farmer)
- Cochran, Georgia – Arthur E. Cochran (judge)
- Cockeysville, Maryland – Thomas Cockey (settler)
- Colchester, Vermont – Earl of Colchester
- Coleville, California – Cornelius Cole (US Senator)
- Colfax, California – Schuyler Colfax (US Vice President)
- Colfax, Washington – Schuyler Colfax (US Vice President)
- Collier County, Florida – Barron Collier
- Colrain, Massachusetts – Lord Coleraine (note spelling)
- Columbus, Georgia and Columbus, Ohio – Christoper Columbus
- Compton, California – Griffith D. Compton (settler)
- Conroe, Texas – Isaac Conroe (Union Cavalry officer)
- Conway, Massachusetts and Conway, New Hampshire – General Henry Seymour Conway (Commander in Chief of the British Army)
- Cooper, Maine – General John Cooper (landowner)
- Cooperstown, New York – William Cooper
- Cordua Bar, California – Theodore Cordua (local merchant)
- Corinna, Maine – Corinna Warren (daughter of Dr. John Warren, landowner)
- Corinne, Utah – Corinne Williamson (daughter of General J.A. Williamson)
- Cornish, New Hampshire – Vice-Admiral Samuel Cornish of the British Royal Navy
- Corpus Christi, Texas – Jesus Christ (Body of Christ)
- Corrigan, Texas – Pat Corrigan (train conductor)
- Cortland, New York – Pierre Van Cortlandt (first Lieutenant Governor of New York)
- Cortlandville, New York – Pierre Van Cortlandt
- Coulterville, California – George W. Coulter (early settler)
- Coutolenc, California – Eugene Coutolenc (early merchant)
- Cowell, California – Joshua Cowell (landowner)
- Crabtree, California – John F. Crabtree (homesteader)
- Craftsbury, Vermont – Ebenezer Crafts (landholder)
- Craig, Modoc County, California – Robert A. Craig (first postmaster)
- Crannell, California – Levi Crannell (lumber company president)
- Crawford, Maine – William H. Crawford (U.S. Senator, Secretary of War, and Secretary of the Treasury)
- Crawfordville, Georgia – William H. Crawford (U.S. Senator, Secretary of War, and Secretary of the Treasury)
- Cressey, California – Calvin J. Cressey (landowner)
- Crockett, California – Joseph B. Crockett (California Supreme Court judge)
- Crockett, Texas – Davy Crockett
- Cromwell, California – F.T Cromwell (founder)
- Crook, Colorado – General George Crook (officer during the Civil War and the Indian Wars)
- Crosbyton, Texas – Stephen Crosby (land office commissioner)
- Cudahy, California – Michael Cudahy
- Cudahy, Wisconsin – Patrick Cudahy
- Culpeper, Virginia – Thomas Colepeper, 2nd Baron Colepeper
- Cumberland, Rhode Island – Prince William, Duke of Cumberland
- Cummings, Mendocino County, California – Jonathan Cummings (early settler)
- Cummington, Massachusetts – Colonel Cummings (landholder)
- Cupertino, California – Joseph of Cupertino
- Curry Village, California – David A. Curry (founder)
- Cushing, Maine – Thomas Cushing (statesman and lieutenant governor of Massachusetts)
- Cutler, Maine – Joseph Cutler (settler)
- Cuttens, California – Charles R. Cuttens (first postmaster)
Read more about this topic: List Of American Places Named After People