| POST OFFICE | ESTABLISHED | DISCONTINUED WITH NOTES |
| Altona | 8 Jun 1857 | 5 Feb 1859 |
| Bard | 23 Nov 1876 | 29 Dec 1886 - mail routed to Wapello |
| re-opened | 12 Feb 1887 | 31 May 1901 - mail routed to Wapello |
| Big Springs | 21 Aug 1863 | 21 Dec 1869 - mail routed to Palestine, Johnson County |
| Black Hawk (Established and changed in Wisconsin Territory) | 27 May 1837 | 8 Nov 1839 - named changed to Toolsborough |
| Buris | 9 Mar 1858 | 6 Oct 1859 |
| Cairo (The same location previously had the post office of Hope Farm) | 1 Jul 1856 | 30 Nov 1918 - mail routed to Columbus Junction |
| re-opened | 21 Aug 1919 | 30 Nov 1921 - mail routed to Columbus Junction |
| Clifton | 14 Mar 1860 | 24 Apr 1877 - mail routed to Columbus Junction |
| re-opened | 19 Feb 1878 | 17 Sep 1890 - named changed to Cotter |
| Columbus City | 3 Mar 1843 | still in operation |
| Columbus Junction | 23 Apr 1872 | still in operation |
| Concord | 30 May 1850 | 28 Jan 1858 |
| Cotter (formerly Clifton) | 18 Sep 1890 | 8 Jun 1984 - mail routed to Columbus Junction |
| Elrick | 13 Dec 1883 | 31 May 1926 - mail routed to Wapello |
| Florence | 5 Jul 1839 | 11 Feb 1846 |
| Forest Hill | 21 May 1857 | 28 Nov 1864 - mail routed to Muscatine, Muscatine County |
| Fredonia | 11 Sep 1839 | 10 May 1842 |
| re-opened | 18 Feb 1860 | 14 Feb 1920 - mail routed to Columbus Junction |
| Gladwin | 10 Jan 1905 | 31 Jul 1933 mail routed to Columbus Junction |
| Grand View (established in Wisconsin Territory) | 2 May 1838 | 19 Jun 1892 - named changed to Grandview |
| Grandview | 20 Jun 1892 | still in operation |
| Harrison | 24 Apr 1840 | 8 Jun 1846 |
| re-opened | 26 Jul 1853 | 20 Jan 1857 |
| Hope Farm | 22 Feb 1840 | 23 Mar 1855 - re-established as Cairo |
| Joy | 29 Nov 1880 | 7 Apr 1881 - mail routed to Wapello |
| Letts (formerly Ononwa) | 1 Oct 1867 | still in operation |
| Lettsville | 20 Jun 1892 | rescinded 4 Nov 1892 |
| Louisa Centre | 15 Apr 1863 | 14 Nov 1865 - mail routed to Wapello |
| Marsh | 19 Sep 1884 | 31 Aug 1925 - mail routed to Winfield, Henry County |
| Mid Prairie (in Henry County briefly in he 1860's) | 9 Feb 1863 | 30 Mar 1877 - mail routed to Virginia Grove |
| Morning Sun | 19 Jun 1851 | still in operation |
| Muscaine | 6 Dec 1839 | now in Muscatine County |
| Newport | 20 Mar 1884 | 31 May 1901 - mail routed to Wapello |
| re opened | 6 Aug 1903 | 15 Jan 1934 - mail routed to Wapello |
| Oakville | 17 Jan 1884 | still in operation |
| Ononwa | 30 Oct 1857 | 30 Sep 1867 - name changed to Letts |
| Palo Alto | 13 Jul 1848 | 1 Feb 1866 - mail routed to Wapello |
| re-opened | 1 May 1866 | 14 Sep 1866 - mail routed to Huron, Des Moines County |
| re-opened | 8 Mar 1871 | 24 Jul 1874 - mail routed to Toolesborough |
| Port Allen | 15 Jun 1848 | moved after 1873, now in Muscatine County |
| Port Louisa | 16 Dec 1847 | 5 May 1879 - mail routed to Wapello |
| re-opened | 7 Feb 1890 | 15 Oct 1891 - mail routed to Wapello |
| re-opened | 17 Feb 1916 | 31 Jan 1918 - mail routed to Wapello |
| Spring Run | 27 May 1852 | 5 Apr 1865 - mail routed to Columbus City |
| Toolesborough (Formerly Black Hawk; changed in Wisconsin Territory) | 9 Nov 1839 | 26 Aug 1892 - name changed to Toolsboro |
| Toolsboro | 27 Aug 1892 | 31 Dec 1903 - mail routed to Wapello |
| Twin Oak | 19 Jun 1873 | 31 Jan 1881 - mail routed to Columbus Junction |
| Virginia Grove | 3 Mar 1843 | 19 Aug 1847 |
| re-opened | 8 Nay 1848 | 6 Nov 1871 - mail routed to Morning Sun |
| Wapello | 15 Aug 1837 | still in operation |
| Wyman | 13 Aug 1880 | 9 Apr 1883 - mail routed to Crawfordsville |
| re-opened | 5 Jul 1883 | 21 Jul 1961 - name changed to Railroad Branch of Crawfordsville |
| Wyman Railroad Branch | 22 Jul 1961 | 15 Dec 1969 - mail routed to Crawfordsville |
