Colorado › Larimer County › Larimer County Commissioner District 1
2 candidates are tracked for Larimer County Commissioner District 1 on the November 3, 2026 ballot: Shane Atkinson and Marc Roberson. Candidate information follows official Larimer County election filings; verify with the official election office linked below.
Open seat: incumbent John Kefalas (District I chair pro tem) did not seek re-election, per the Larimer County Board of County Commissioners roster. Shane Atkinson won the June 30, 2026 Democratic primary unopposed with 49,229 votes; Marc Roberson won the Republican primary unopposed with 28,127 votes, per the county's certified primary Election Summary Report (July 1, 2026, 4:37 PM posting). Both advance to the November 3, 2026 general election.
Democratic
Shane Atkinson works as legislative affairs coordinator in the Larimer County Manager's Office, per The Rocky Mountain Collegian. He is a former high school teacher who previously worked as a constituent advocate in U.S. Rep. Joe Neguse's office, per the same source.
Republican
Roberson's campaign has focused on fiscal responsibility and lower property taxes, per Estes Valley Voice. No campaign website or questionnaire response was found as of September 8, 2026.