The Ballot Brief
Boulder County, Colorado

Colorado Senate District 17

2 candidates are tracked for Colorado Senate District 17 on the November 3, 2026 ballot: Katie Wallace and Pat Miller. Candidate information follows official Boulder County election filings; verify with the official election office linked below.

About this race

Katie Wallace (Democratic), Pat Miller (Republican) are on the November 3 ballot for Colorado Senate District 17; Katie Wallace is the sitting member, per the General Assembly roster (leg.colorado.gov). 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.

What this office does

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. The sitting officeholder, Katie Wallace, is on the ballot.

Colorado › Boulder County › Colorado Senate District 17

Katie Wallace

Democratic Incumbent

Biography

Katie Wallace is the Democratic state senator for Senate District 17 in Boulder and Weld counties, appointed to the seat by a Democratic vacancy committee in March 2025, per The Colorado Sun. She chairs the State, Veterans, & Military Affairs committee and sponsored or co-sponsored 31 bills in the 2026 session on environmental protection, criminal justice and health care access, per the Colorado General Assembly. No campaign website was found as of September 8, 2026.

Pat Miller

Republican

Biography

Patricia (Pat) Miller is the Republican candidate for Colorado Senate District 17, according to Colorado Secretary of State campaign finance records, per Colorado Secretary of State (historicalelectiondata.coloradosos.gov). No campaign website was found as of September 8, 2026.

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Questions about this race

Who is running for Colorado Senate District 17 in 2026?

2 candidates are tracked for Colorado Senate District 17 on the November 3, 2026 ballot: Katie Wallace and Pat Miller. Candidate information follows official Boulder County election filings; verify with the official election office linked below.

When is the Colorado Senate District 17 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 Boulder 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.

Verify this race

Candidate roster from official Boulder County and state election office filings, last verified September 27, 2026. Bios and priorities carry their attribution inline.

Cross-check with the official Colorado election office, or see the full Boulder County sample ballot and your exact ballot by address.

The rest of your Boulder County ballot

15 tracked races in Boulder County, Colorado. Landed here from another county's search? Look up your own ballot below.

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Colorado House District 11Colorado House District 12Colorado House District 19See all 15 Boulder County races
Candidate profiles
Katie Wallace, full profilePat Miller, full profileOfficial Colorado election office