2 candidates are tracked for Colorado Senate District 20 on the November 3, 2026 ballot: Richard (Rich) Mancuso and Sheila Lieder. Candidate information follows official Jefferson County election filings; verify with the official election office linked below.
Richard (Rich) Mancuso (Republican), Sheila Lieder (Democratic) are on the November 3 ballot for Colorado Senate District 20. Not on the November ballot: Lisa Cutter, the sitting member per the roster. Major-party nominees were chosen at the June 30 primary; minor-party nominees by assembly or petition and unaffiliated candidates by petition. The field is the Secretary of State's 2026 General Election candidate list. This seat is elected by district; only the district covering your address appears on your ballot.
State legislator. State legislators write and vote on state laws and the state budget, which fund schools, roads, prisons, universities and health programs, and set the rules for local governments and elections. Each member represents one district and serves on committees that shape bills before a floor vote. Terms are two years in most state houses and four in most state senates.
This race. Elected by district: only voters who live in the district see this race on their ballot.
Colorado › Jefferson County › Colorado Senate District 20
Republican
Richard (Rich) Mancuso is the Republican candidate for Colorado Senate District 20 on the November 3, 2026 ballot, per the Secretary of State's 2026 General Election candidate list. No campaign website was found as of September 8, 2026.
Democratic
Per the campaign site.
Sheila Lieder is a candidate for Colorado Senate District 20, per her campaign site. She previously served in the Colorado House representing Jefferson County, per her campaign site.
Who is running for Colorado Senate District 20 in 2026?
2 candidates are tracked for Colorado Senate District 20 on the November 3, 2026 ballot: Richard (Rich) Mancuso and Sheila Lieder. Candidate information follows official Jefferson County election filings; verify with the official election office linked below.
When is the Colorado Senate District 20 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.