Discontinued and Renamed Post Offices
This information comes from a book by Guy Reed Ramsey titled "Postmarked Iowa: A List of Discontinued and Renamed Post Offices" from 1976. It contains information for all the Iowa counties. I have listed some of the information for Jackson county below. Some of the post offices were closed and opened a few times before they were finally discontinued. Some of the places were renamed, for example Carl Port eventually became Sabula.
| NAME | ESTABLISHED | DISCONTINUED | |
| Alma | 26 Aug 1892 | 14 May 1895 | |
| America | 10 Apr 1886 | 18 Aug 1886 | |
| Amoy | 07 Jan 1847 | 14 Nov 1848 | |
| Belleview | 14 Nov 1839 | Unrecorded | |
| Bridgeport | 01 May 1850 | 19 Dec 1874 | |
| Brookfield | 08 Jul 1850 | 11 Nov 1850 | |
| Canton | 15 Jul 1846 | 15 Oct 1919 | |
| Carl Port | 24 Jul 1837 | 30 Nov 1837 | |
| Cobb, Mill Rock | 23 Oct 1851 | June 1860 | |
| Copper Creek, Van Buren | 11 Oct 1849 | 15 May 1901 | |
| Cottonville | 02 Sep 1850 | 14 Dec 1900 | |
| Crabb's Mills | 07 Jun 1872 | 15 Aug 1878 | |
| Deventersville | 13 Jul 1838 | 18 Jul 1840 | |
| Duggan | 22 May 1893 | 14 Nov 1902 | |
| Emeline | 16 Dec 1854 | 14 Dec 1900 | |
| Farmer's Creek | 16 Sep 1852 | 01 Sep 1873 | |
| Fulton | 19 Jun 1851 | 15 Aug 1942 | |
| Garry Owen | 22 Sep 1846 | 14 Nov 1902 | |
| Gordon's Ferry | 21 Apr 1873 | 31 May 1904 | |
| Hickory Grove | 19 Sep 1850 | 06 Sep 1867 | |
| Higginsport | 31 Oct 1851 | 02 Jan 1892 | |
| Hugo | 17 Feb 1898 | 14 Nov 1902 | |
| Hurstville | 16 Jan 1897 | 15 May 1942 | |
| Iron Hills | 01 Aug 1851 | 15 Aug 1916 | |
| Mount Algor | 23 Nov 1855 | 22 Jan 1875 | |
| Nashville | 20 Nov 1871 | 28 Feb 1935 | |
| New Castle | 14 Jul 1851 | 04 Aug 1851 | |
| Otter Creek, Wagonersburgh | 07 May 1852 | 30 Aug 1902 | |
| Ozark | 10 Jan 1854 | 02 Dec 1897 | |
| Pass | 19 Jan 1854 | 17 May 1888 | |
| Prairie Springs | 09 Oct 1844 | 19 Aug 1847 | |
| Rolley | 16 Dec 1854 | 18 Mar 1864 | |
| Smith's Ferry | 19 Jul 1852 | 07 Jan 1851 | |
| Spruce Mills | 19 Jul 1852 | 24 May 1864 | |
| Sterling | 03 Jun 1852 | 30 Aug 1902 | |
| Sullivan | 09 Apr 1850 | 24 Sep 1861 | |
| Summer Hill | 13 Jun 1854 | 20 Jun 1866 | |
| Union Centre | 30 Dec 1863 | 15 Aug 1899 | |
| Waterford | 02 Mar 1855 | 25 Nov 1867 |