| State: | Montana Territory |
| District Number: | AL |
| Member Type: | Delegate |
| Representative: | N/A |
| Obsolete: | yes |
| Created: | 1864 |
| Custom Created: | as a non-voting delegate was granted by Congress |
| Eliminated: | 1889 |
| Statehood Eliminated: | yes |
| Years: | 1864–1889 |
Montana Territory's at-large congressional district is an obsolete congressional district that encompassed the area of the Montana Territory, which was split off from the Idaho Territory in 1864. After Montana's admission to the Union as the 41st state by act of Congress on November 8, 1889, this district was dissolved and replaced by Montana's at-large congressional district.
On May 26, 1864, an act of Congress gave Montana Territory the authority to elect a congressional delegate,[1] though the first delegate did not take his seat until 1865.
| Delegate | Party | Years | Cong ress | Electoral history | ||||
|---|---|---|---|---|---|---|---|---|
| Vacant | nowrap | May 26, 1864 – January 6, 1865 | ||||||
| align=left | Samuel McLean | Democratic | nowrap | January 6, 1865 – March 3, 1867 | Elected in 1864.[2] Re-elected in 1865. Retired. | |||
| align=left | James M. Cavanaugh | Democratic | nowrap | March 4, 1867 – March 3, 1871 | Elected in 1866. Re-elected in 1868. Lost renomination. | |||
| align=left | William H. Clagett | Republican | nowrap | March 4, 1871 – March 3, 1873 | Elected in 1871.[3] Lost re-election. | |||
| align=left | Martin Maginnis | Democratic | nowrap | March 4, 1873 – March 3, 1885 | Elected in 1872. Re-elected in 1874. Re-elected in 1876. Re-elected in 1878. Re-elected in 1880. Re-elected in 1882. Retired. | |||
| align=left | Joseph K. Toole | Democratic | nowrap | March 4, 1885 – March 3, 1889 | Elected in 1884. Re-elected in 1886. Retired. | |||
| align=left | Thomas H. Carter | Republican | nowrap | March 4, 1889 – November 8, 1889 | Elected in 1888. Position eliminated upon statehood. | |||