2 candidates are tracked for Jefferson County Sheriff on the November 3, 2026 ballot: Regina "Reggie" Marinelli and Randall Doizaki. Candidate information follows official Jefferson County election filings; verify with the official election office linked below.
Incumbent Sheriff Regina "Reggie" Marinelli, a Democrat who has held the office since January 2023 after a 40-year career at the Sheriff's Office, seeks reelection against Republican nominee Randall Doizaki, per Jefferson County's official leadership page and the Jefferson County Democratic and Republican parties' 2026 candidate pages. This contest is on the November 3, 2026 ballot.
Sheriff. The sheriff runs the county's law enforcement agency, operates the county jail, provides courthouse security and serves court papers such as warrants, subpoenas and evictions. In many counties the sheriff's office is the primary police force for areas outside city limits. The sheriff hires deputies and manages the office's budget within what the county board approves.
This race. Every voter in Jefferson County votes on this seat. The sitting officeholder, Regina "Reggie" Marinelli, is on the ballot.
Colorado › Jefferson County › Jefferson County Sheriff
Democratic Incumbent
Regina "Reggie" Marinelli is the sitting Jefferson County Sheriff, in office since January 2023 after a 40-year career at the Sheriff's Office, per the county's official leadership page and the Jefferson County Democratic Party.
Republican
Per the campaign site.
Doizaki is a Marine Corps veteran and retired lieutenant with more than 23 years at the Arapahoe County Sheriff's Office, now serving as a lieutenant with Denver Public Schools' Department of Climate and Safety, per the campaign site. He holds a master's degree in organizational leadership and human resources and is a certified leadership coach, per the campaign site.
Who is running for Jefferson County Sheriff in 2026?
2 candidates are tracked for Jefferson County Sheriff on the November 3, 2026 ballot: Regina "Reggie" Marinelli and Randall Doizaki. Candidate information follows official Jefferson County election filings; verify with the official election office linked below.
When is the Jefferson County Sheriff election in Colorado?
Election Day is Tuesday, November 3, 2026. Registration deadlines, early voting dates and mail ballot rules for Colorado are on the Colorado election hub at theballotbrief.com.
How do I see my exact Jefferson County ballot?
Enter your ZIP code in the lookup at theballotbrief.com for the statewide and congressional races, or a full street address to add the county, city and district contests for that location.
Candidate roster from official Jefferson County and state election office filings, last verified September 25, 2026. Bios and priorities carry their attribution inline.
Cross-check with the official Colorado election office, or see the full Jefferson County sample ballot and your exact ballot by address.
19 tracked races in Jefferson County, Colorado. Landed here from another county's search? Look up your own ballot below.