| Election Name: | 1889 Montana gubernatorial election |
| Country: | Montana |
| Flag Year: | 1889 |
| Type: | presidential |
| Ongoing: | no |
| Next Election: | 1892 Montana gubernatorial election |
| Next Year: | 1892 |
| Election Date: | October 1, 1889 |
| Nominee1: | Joseph Toole |
| Party1: | Democratic Party (United States) |
| Popular Vote1: | 19,735 |
| Percentage1: | 50.96% |
| Nominee2: | Thomas C. Power |
| Party2: | Republican Party (United States) |
| Popular Vote2: | 18,991 |
| Percentage2: | 49.04% |
| Map Size: | 300px |
| Governor of Montana Territory | |
| Before Election: | Benjamin White |
| Before Party: | Republican Party (United States) |
| Posttitle: | Governor of Montana after election |
| After Election: | Joseph Toole |
| After Party: | Democratic Party (United States) |
The 1889 Montana gubernatorial election took place on October 1, 1889. This was the first gubernatorial election in Montana. Democratic candidate Joseph Toole narrowly beat Republican candidate Thomas C. Power. Toole was the only Democrat elected for Montana's six executive offices. Toole was sworn in on November 8, 1889, and his term ended January 2, 1893.
Toole would be elected again in 1900 and 1904. He resigned near the end of his third term due to ill health.[1] He is the longest served Governor of Montana, at 11 years, and the only Governor elected to nonconsecutive terms. Power would be elected United States Senator by the Montana Legislature after statehood.