The 2020 Montana gubernatorial election was held on November 3, 2020, to elect the next governor of Montana, concurrently with the U.S. presidential election, as well as elections to the U.S. Senate and the House of Representatives and various state and local elections. It resulted in voters selecting Greg Gianforte over Mike Cooney. Incumbent Democratic governor Steve Bullock was term-limited and could not seek a third consecutive term in office, and he ran unsuccessfully for Montana's Class II Senate seat.
Bullock's lieutenant governor, Mike Cooney, was the Democratic nominee, while the Republican nominee was Montana's at-large representative Greg Gianforte, who won the election, making him the first Republican governor of Montana since Judy Martz left office in 2005. This was the only gubernatorial seat to change partisan control in the 2020 elections. This election marked the first time since the 1920s that Republicans controlled all state constitutional offices and a majority of the legislature.
Polls with a sample size of <100 have their sample size entries marked in red to indicate a lack of reliability.
Polls with a sample size of <100 have their sample size entries marked in red to indicate a lack of reliability.
with Mike Cooney, Tim Fox, Greg Gianforte, Albert Olszewski, Ron Vandevender and Whitney Williams<br />
with Mike Cooney, Tim Fox, Greg Gianforte, Reilly Neill, Albert Olszewski, Gary Perry, Casey Schreiner and Whitney Williams<br />
with Tim Fox, Matt Rosendale, Corey Stapleton, Kathleen Williams and Whitney Williams<br />
Counties that flipped from Democratic to Republican
Partisan clients<br />
Official campaign websites