Retrieved from Idaho Postal History by Mark Metkin
| PO | Dates | Comments |
| ALBANY FALLS | 1907-1914 | |
| ALBENI | 1891-1893 | |
| BLACKTAIL | 1902-1911 | |
| BLANCHARD | 1908-Date | was WHITE |
| BOYER | 1903-1908 | was KOOTENAI |
| BROTEN | 1916-1954 | |
| CABINET | 1904-1954 | |
| CAREYWOOD | 1911-1967 | was SEVERANCE |
| now CPO | ||
| CEMENT | 1913-1914 | |
| CHANCE | 1904-1907 | |
| CLAGSTONE | 1907-1956 | |
| CLARA | 1903-1910 | |
| CLARK FORK | 1893-Date | was CLARK'S FORK |
| CLARK'S FORK | 1886-1893 | renamed CLARK FORK |
| COCOLALLA | 1908-Date | |
| COLBURN | 1901-1959 | now CPO |
| COOLIN | 1893-1900 | renamed WILLIAMS |
| 1907-Date | ||
| CULVER | 1907-1908 | |
| DOVER | 1910-Date | was WELTY |
| DUFORT | 1902-1908 | |
| EDGEMERE | 1913-1960 | |
| ELMIRA | 1892-1894 | was HALFWAY |
| 1900-1954 | now CPO | |
| GERICH | 1910-1911 | renamed RIVERSIDE |
| GLENGARY | 1906-1944 | |
| GRANITE | 1883-1884 | |
| 1888-1896 | ||
| 1897-1898 | ||
| 1900-1954 | ||
| HALFWAY | 1891-1892 | renamed ELMIRA |
| HARLEM | 1907-1918 | |
| HOPE | 1887-Date | |
| IOLA | 1902-1914 | renamed SAMUELS |
| KOOTENAI | 1885-1895 | |
| 1895-1903 | renamed BOYER | |
| 1904-1963 | now CPO | |
| LACLEDE | 1901-Date | was MARKHAM |
| LAKEVIEW | 1890-1944 | |
| MARKHAM | 1892-1901 | renamed LACLEDE |
| MIDAS | 1909-1939 | |
| MORTON | 1907-1940 | |
| NEWMAN | 1904-1914 | |
| NEWPORT | 1891-1900 | in Idaho |
| 1900-Date | in Washington | |
| NORDMAN | 1915-Date | |
| PEND D'OREILLE | 1882-1893 | renamed SANDPOINT |
| PONDERAY | 1905-Date | |
| PRIEST RIVER | 1891-Date | |
| RIVERSIDE | 1911-1915 | was GERICH |
| SAGLE | 1900-Date | |
| SAMUELS | 1914-1985 | was IOLA |
| SANDPOINT | 1893-Date | was PEND D'OREILLE |
| county seat | ||
| SAWYER | 1904-1930 | |
| SENEAGUOTEEN | 1891-1891 | renamed SENEAQUOTEEN |
| SENEAQUOTEEN | 1891-1902 | was SENEAGUOTEEN |
| operated as SENEAGUOTEEN | ||
| renamed VALLEY | ||
| SEVERANCE | 1904-1911 | renamed CAREYWOOD |
| TALACHE | 1917-1934 | |
| VALLEY | 1902-1920 | was SENEAQUOTEEN |
| 1922-1923 | renamed VAY | |
| VAY | 1923-1958 | was VALLEY |
| VENTNOR | 1881-1882 | |
| WELTY | 1909-1910 | renamed DOVER |
| WESTBRANCH | 1909-1913 | |
| WESTMOND | 1903-1925 | |
| WHITE | 1903-1908 | renamed BLANCHARD |
| WILLIAMS | 1900-1907 | was COOLIN |
| WRENCOE | 1901-1916 |
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