| Post Office | County | Established | Discontinued | Notes |
| Arnold | Brown | 1897-07-27 | 1898-07-30 | |
| Baker | Brown | 1882-10-05 | 1933-11-15 | |
| Buncomb | Brown | 1870-05-02 | 1871-11-22 | Moved to Saint Francis. |
| Carson | Brown | 1857-12-09 | 1884-11-26 | Name changed from Sawin's Store. |
| Carson | Brown | 1884-12-16 | 1898-06-30 | |
| Claytonville | Brown | 1857-08-08 | 1865-02-07 | |
| Claytonville | Brown | 1865-03-24 | 1882-06-09 | |
| Cleo | Brown | 1885-03-03 | 1897-09-30 | |
| Comet | Brown | 1881-03-07 | 1894-10-31 | Moved from Discord. |
| Coss | Brown | 1885-03-09 | 1887-04-29 | |
| Danes Mill | Brown | 1879-02-07 | 1879-02-25 | Name changed to Padonia. |
| Discord | Brown | 1874-06-22 | 1881-03-07 | Moved to Comet. |
| Emmett | Brown | 1881-10-03 | 1882-11-21 | |
| Everest | Brown | 1882-06-23 | Open in 1961 | Moved from Eyerton. |
| Eyerton | Brown | 1881-05-03 | 1882-06-23 | Moved to Everest. |
| Fairview | Brown | 1869-03-23 | Open in 1961 | |
| Fidelity | Nemaha | 1890-06-14 | 1902-05-15 | Established in Brown County (site moved). |
| Frinkville | Brown | 1878-02-11 | 1883-03-06 | |
| Germantown | Brown | 1897-07-22 | 1918-07-22 | Name changed to Mercier. |
| Grand Prairie | Brown | 1870-07-27 | 1875-09-22 | |
| Grand Prairie | Brown | 1875-10-13 | 1888-04-30 | |
| Hamlin | Brown | 1857-12-05 | 1973-04-13 | |
| Hiawatha | Brown | 1858-07-13 | Open in 1961 | |
| Horton | Brown | 1886-11-15 | Open in 1961 | |
| Jonesville | Brown | 1879-06-20 | 1885-01-29 | |
| Kennekuk | Atchison | 1857-06-08 | 1900-10-20 | Established in Brown County. |
| Mannville | Brown | 1871-01-09 | 1876-07-17 | |
| Marak | Brown | 1870-08-03 | 1882-10-05 | |
| Mercier | Brown | 1918-07-22 | 1972-09-15 | Name changed from Germantown. |
| Mission Centre | Brown | 1877-07-02 | 1882-06-14 | Moved to Willis. |
| Morrill | Brown | 1870-12-14 | Open in 1961 | |
| Mount Roy | Brown | 1857-09-02 | 1858-07-24 | |
| Mount Roy | Brown | 1871-12-04 | 1882-08-24 | |
| Netawaka | Jackson | 1868-01-20 | Open in 1961 | Established in Brown County. |
| New Eureka | Jackson | 1858-09-17 | 1875-01-12 | Was also in Brown County for a time. Established in Calhoun County. |
| Nohart | Brown | 1859-03-05 | 1860-10-10 | Post office moved into Nebraska. |
| Padonia | Brown | 1857-10-20 | 1878-09-26 | |
| Padonia | Brown | 1879-02-25 | 1914-03-15 | Name changed from Danes Mill. |
| Padonia | Brown | 1914-08-03 | 1933-05-31 | |
| Pierce Junction | Brown | 1888-02-25 | 1914-03-15 | |
| Pony Creek | Brown | 1858-06-21 | 1861-09-19 | |
| Powhatan | Nemaha | 1857-07-17 | 1867-12-18 | Moved to Wetmore. Established in Brown County. |
| Powhattan | Brown | 1887-03-17 | Open in 1961 | |
| Randall | Brown | 1864-03-23 | 1864-04-02 | [Order of change rescinded] |
| Reserve | Brown | 1882-10-05 | 1983-03-18 | |
| Robinson | Brown | 1858-06-30 | Open in 1961 | |
| Saint Francis | Brown | 1871-11-22 | 1872-11-11 | Moved from Buncomb. |
| Sawin's Store | Brown | 1857-09-24 | 1857-12-09 | Name changed to Carson. |
| Springs | Brown | 1896-02-20 | 1902-03-31 | |
| Tyler's | Brown | 1864-03-23 | 1878-01-08 | |
| Ununda |
Brown |
1864-03-23 |
1871-03-20 |
|
| Willis |
Brown |
1882-06-14 |
1960-01-31 |
Moved from Mission Centre. |