| Post Office | County | Date Established/Discontinued | Postmaster | Cover Link |
| Cachemasso | Dallas | 1849-1867 | Alsey J. Hunter (8-22-61), Isaac P. Tenney (2-8-62) | |
| Caddo Cove | Montgomery | 1848-1866 | James H Farr | |
| Cadron | Conway | 1818-Changed to Martinville, 1887 | G.W. Sherman, S.V. Patton (8-22-61) | |
| Calhoun | Columbia | 1849-1904 | Littleberry W. Baker, C.P.Sweeny, A.M.Womak(2-24-62), L.W. Baker(1-10-65) | |
| Calico | Izard | (Calico Rock in the US System) 1851-Present. CSA estb 4-14-62 | R.O.Blair | |
| Calvert | St. Francis | 1856-1871 | J.Lynch | |
| Camanche | Lawrence | 1856-1866 | Thomas J. Gay (8-22-61), Thomas James (9-6-61) | |
| Camden Dbl Circle PAID 10 | Washita | 1843-Present | Adolphus Bacchus (8-20-61), William M. Mimms (7-11-63) | robert_kaufmann_sale39_lot605 Camden dbl circle PAID 10.JPG |
| Camden Single Crcl PAID 10 | | | | RSiegel_Sale_927_Lot_1543.jpg |
| Camden PAID no rate | | | | SRumsey_Sale29_Lot3081 Camden Paid no rate.jpg |
| Camden DUE 10 Hsp | | | | RSiegel_Sale_927_Lot_1545.jpg |
| Camden due 10 manuscript | | | | RSiegel_Sale_927_Lot_1546.jpg |
| Camden Forwarded 5 due manuscript | | | | rsiegel_sale779_lot517 camden fwrd due dr snyder.jpg |
| Campabello | Greene | 1856-1866 | Alfred P. Bobo | |
| Campbell | Desha | 1856-1866 | J.W.Patterson | |
| Cane Creek | Conway | 1858-1878 | John Casey | |
| Caney | Washita | 1850-1906 | William Marsh (Aug 20, 1861), W.C. Hatley (Oct 5, 1864) | |
| Cannon | Pope | 1860-1866 | Freeman Winfield (Aug 20, 1861), George Havens (Nov 12, 1861) | |
| Canton | Lawrence | 1840-1873 | Wiley C. Jones | |
| Carouse | Washita | 1859-1890 | W.K. Thompson, J.R. Horne (Jul 10, 1863) | |
| Carrollton | Carroll | 1834-1922 | Wright Massengale (Aug 20, 1861) | |
| Casa | Perry | 1854-Present | George McGhee (Dec 5, 1861) | |
| Cass | Franklin | 1848-1958 | Grimalda C. Sadler (Aug 22, 1861) | |
| Casscoe | Arkansas | 1852-Present | Phillip J. Trice (Oct 31, 1861) | |
| Cat Island | Crittenden | 1858-1867 | Walter Blandford, William W. Douds (Oct 14, 1861) | JPalazolo-cat island-aug 12 1861- paid 10 ms.jpg |
| Cave Creek | Newton | 1855-1973 | Isaiah Dodson, William Garner (Oct 14, 1861) | |
| Cedar Creek | Scott | 1852-1973 | John C Burness (Aug 20, 1861) | |
| Centre Hill | White | 1856-1931 | Robert Query (Aug 22, 1861) | |
| Centre Point | Sevier | 1849-1873 | Nathan Levi, A.G.Henry (Oct 8, 1864) | RKaufmann_Sale39_Lot606 Centre Point Paid 5.jpg |
| Centreville | Montgomery | 1851-1878 | Balaam Strawn, Fielding Strawn (Jul 10, 1863) | |
| Chalybeate Springs | Columbia | Est & Disct U.S. 1860, est CSA Sep 6, 1861 | Cyrus P. Swinney (Sep 6, 1861), A.M. Womack (Mar 8, 1862) | azimmerman_sale50_lot520.jpg |
| Chambersville | Dallas | 1850-1866 | F.E. Samuel (Aug 20, 1861), Richard Atkinson (Oct 14, 1861, F.E. Samuel (Apr 8, 1862) | |
| Champagnolle | Union | 1846-1918 | William H. Adams (Nov 30, 1861), Thomas Owens (Nov 23, 1864) | dphillips_sale92_lot1243.jpg |
| Charleston | Franklin | 1846-Present | E.M. Richardson | |
| Cherokee Bay | Randolf | 1857-1886 | Jacob W Sharer | |
| Cherry Grove | Saline | 1851-1914 | James L Isaacs (Aug 20, 1861) | |
| Cherryville | Prairie | 1858-1866 | George W. Cherry (Aug 20, 1861) | |
| Chester | Ashley | 1855-1867 | William J Hogue (Aug 20, 1861) | |
| Chismville | Scott | 1857-1934 | William M. Oliver (Oct 14, 1861) | |
| Chocoville | Sebastian | 1852-1887 | Blaney Harper | |
| Churchill | Pulaski | 1860-1866 | James L. Misenhimer | |
| Cincinnati | Washington | 1857-1911 | William S. Walker, John M. Cox (Aug 22, 1861) | |
| Clamanda | Lawrence | 1860-1877 | Benjamin G. Arendale | |
| Clarendon | Monroe | 1837-Present | John C. Duncan (Aug 20, 1861) | |
| Clark's Mills | Johnson (shows in Hempstead in US lists) | 1841-1867 | A.J.Stevens (Aug 20, 1861) | |
| Clarksville | Johnson | 1841-Present | Gabriel W. Payne (Aug 20, 1861) | TKaufmann Clarksville Paid 10 ms.jpg |
| Clear Creek | Marion | 1855-1888 | James D. Stanley | |
| Clear Lake | Prairie | 1858-1867 | Charles W. Womack | |
| Clear Point | Arkansas | 1857-Changed to Goldman 1886 | Thaddeus N. Ferral | |
| Clear Spring | Clark | 1856-1911 | William B. Trout (Oct 31, 1861), John W. Barrton (Apr 15, 1862) | |
| Cllifty | Madison | 1858-1974 | Benjamin Vaughan | |
| Clinton | Van Buren | 1833-Present | Johnathan Bradley | |
| Cobbsville | Johnson | 1851-1866 | Calvin Accord | |
| Cold Water | Poinsett | 1854-to Cross Co. 1865-disc 1878 | Samuel G. Absten (Aug 22, 1861), David Black (Oct 14, 1861) | |
| Cold Well | White | 1850-1873 | Elijah Littel | |
| Colerain | Jackson | 1851-1866 | William W. Allison (Aug 22, 1861) Disc in CSA records Nov 7, 1861) | |
| Collegeville | Saline | 1835-1899 | William W. Hayes (Disc Nov 11, 1862, Rest Mar 11, 1863) J.B. Annis Mar 11, 1863 | |
| Columbia | Chicot | from Villemont, 1833, to Luna Landing 1879 | Cyrus Hanks | RSiegel_Sale_927_Lot_1547.jpg |
| Columbus | Hempstead | 1834-Present | M.V. Cheatham (Aug 22, 1861) | |
| Como | Dallas | 1855-1914 | Homer N. Darby | |
| Constitution | Franklin | 1851-1866 | D.L Bourland (Disc CSA Sept 2, 1861) | |
| Convenience | Independence | 1855-1904 | Urban E. Fort (Aug 22, 1861) | |
| Cornersville | Drew | 1857-1866 | J.S. Rice, W.D. Avery (Nov 16, 1861) | |
| Cotton Plant | St. Francis | 1852-Present | John A. Baker, D.H. Johnson (Aug 22, 1861) | |
| Council Bend | Crittenden | 1846-1883 | James Clark | |
| Cove | Polk | 1850, Name Changed to Hatfield 1897 | Peter B Allen | |
| Crawford's Springs | Crawford | August 6, 1861 in the CSA | George W. Norris (Aug 6, 1861) | |
| Crockett's Bluff | Arkansas | 1848-Present | Erasmus Inman | |
| Crooked Creek | Carroll | 1836-changed to Harrison 1870 | Joseph B. Baines (Aug 20, 1861) | |
| Crosson's Store | Randolf | 1853-1868 | James P. Ingram | |
| Cross Plains | Fulton | 1852-1866 | John S. Sharer | |
| Crystal Hill | Montgomery | 1858-1871 | William E. Maddox (Aug 22, 1861) | |
| Cumfort | Van Buren | 1857-1866 | W. B. Foster (Oct 14, 1861) | |
| Cummins | Arkansas | 1853-1925 | Edward C. Martin | rkaufman_sale71_lot72.jpg |
| Curia | Independence | 1848-1913 | Z.W. Vincil | |
| Cut Off | Drew | 1850-changed to Collins 1873 | J.W. Walker | rkaufmann_sale37_lot106.jpg |
| Cypress | Monroe | 1841-1874 | William R Ward-changed to Manassas Sept 6 1861 | |
| Cypress Creek | Desha | 1858-1873 | A.K. Moore | |
| Cypress Mills | Perry | 1853-disc in CSA, no date | S. R. Lyon | |