Jeff Essmann (born June 29, 1952) is an American politician and a Republican former member of the Montana Senate.

[1] Essmann served as the president of the Montana Senate from 2013 to 2015.

He is most notable for proposing Senate Bill 423 to legalize use of medical marijuana in Montana.

[2] Essmann ran for Governor of Montana in 2012 election.

[4] Essmann served as the chairman of the Montana Republican Party from 2015 to 2017.