The Ballot Brief
Arapahoe County, Colorado

Arapahoe County Treasurer

ColoradoArapahoe County › Arapahoe County Treasurer

One candidate is tracked for Arapahoe County Treasurer on the November 3, 2026 ballot: Michael Westerberg. Candidate information follows official Arapahoe County election filings; verify with the official election office linked below.

Democratic incumbent Michael Westerberg was unopposed in his June 30, 2026 primary (78,038 votes, 100%); no Republican candidate filed, per the certified summary report. He is expected to appear unopposed on the November 3, 2026 ballot; the county's certified November list was not yet posted as of Sept 8, 2026, so a late unaffiliated or minor-party petition candidate could not be ruled out.

Michael Westerberg

Democratic · Incumbent

Westerberg is the sitting Arapahoe County Treasurer, per the county's official treasurer page. He was first elected four years ago and is running for re-election, per his campaign site. He was unopposed in the Democratic primary, per the certified summary report.

2026 priorities (per the campaign site)

Source: candidate campaign site.

Campaign site →
Verify this race
Candidate roster from official Arapahoe County Supervisor of Elections filings. Bios and priorities carry their attribution inline.
Cross-check with the official Colorado election office, or see the full Arapahoe County sample ballot and your exact ballot by address.