Undersheriff Jason Grimmis

Undersheriff Jason Grimmis

Jason Grimmis began his career with the Lewis and Clark County Sheriff's Office as a detention officer in 1993. In 1998 he transferred to the patrol division. In 2003 he was promoted to the position of Patrolman II and in 2006 to Patrolman I. In 2009 he was promoted to Patrol Sergeant, and three years later he became Patrol Captain. He returned to the detention division in 2014 and became Detention Captain. He has also served on both the Search and Rescue and Civil Disobedience teams.

Jason was slated to become Special Operations Captain in 2017 but because of the unexpected departure of Undersheriff Dave Rau in December, 2016, he applied to be Undersheriff Rau's replacement. He officially became Undersheriff of Lewis and Clark County on January 1, 2017.

Contact us...

Emergencies - 9-1-1

Non-Emergencies - (406) 447-8293


Sheriff Leo C. Dutton    

Undersheriff Jason Grimmis

Phone: (406)447-8235

Finance Officer:
Tammy Potter 
Phone: (406)447-8258 

Mailing Address:
221 Breckenridge
Helena, MT 59601