| POST OFFICE | DATES |
| Actus | 1880-1908 |
| Auburn | 1886-1908 |
| Back Bone | 1856-1866 |
| Backbone | 1878-1878 |
| Barling | 1890-1973 |
| Bedford | 1890-1903 |
| Beltville | 1884-1884 |
| Bethell | 1880-1880 |
| Beverly | 1877-1915 |
| Biswell Springs | 1889-189? |
| Black Jack | 1851/1877 |
| Bloomer | 1851/1923 |
| Bonanza | 1897-1959 |
| Bonanza Rur. Sta. | 1960-1964 |
| Breckenridge | 1858-1866 |
| Brunner | 1852-1867 |
| Burma | 1901-1904 |
| Burnville | 1879-1912 |
| Camp Chaffee Br. | (DPO) |
| Cavanaugh | 1886-1902 |
| Central | 1883-1917 |
| Crescent | 1889-1903 |
Dayton
Formerly Hodges Prairie Post Office moved to Dr. Hiller's drugstore in 1873) | 1873-1905 |
| Enterprise | 1871/1898 |
| Excelsior | 1882/1912 |
| Fort Smith | 1829-Date |
| Fort Smith Sta. A | (?-DPO) |
| Greenwood | 1852-Date |
| Gwynn | 1899-1905 |
| Hackett | 1887-Date |
| Hackett | City 1877-1887 |
| Hartford (1) | 1874-1905 |
| Hartford (2) | 1905-Date |
Hodges Prairie
(became Dayton Post Office in 1873 located at Dr. Thos. C. Hiller's drugstore) | 1853/1873 |
| Huntington | 1887-Date |
| Ipava | 1881-1890 |
| Ipavo | 1880-1881 |
| Iris | 1882-1883 |
| Island | 1890/1911 |
| James Fork | 1847/1877 |
| Jenny Lind | 1851/1959 |
| Jenson | 1887-1906 |
| Langston | 1886-1886 |
| Lavaca | 1881-Date |
| Liverpool | 1887-1888 |
| Long Prairie | 1855/1871 |
| Mark | 1885-1887 |
| Massaro | 1877/1901 |
| Midland | 1904-Date |
| Military Grove | 1879-1881 |
| Milltown | 1880-1912 |
| Milor | 1860/1875 |
| Montreal | 1891-1910 |
| Montrose | 1876-1883 |
| Myers Landing | 1877-1879 |
| Narrows | 1899-1900 |
| Neal | 1888-1892 |
| Nep | 1900-1905 |
| New Market | 1853/1872 |
| Peoria | 1878-1915 |
| Prairie Creek | 1907-1910 |
| Randolph | 1886-1888 |
| Round Knob | 1855-1856 |
| Rye | 1886-1888 |
| Slatonville | 1890-1911 |
| South Fort Smith | 1910-1963 |
| Sugar Loaf | 1847/1902 |
| Ursula | 1898-1943 |
| Vache Grass | 1858-1866 |
| Valley | 1858-1866 |
| Washburn | 1875-1933 |
| West Hartford | 1905-1918 |
| Witcherville | 1875-1926 |
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