Idaho State House District 12A

Current seat holder: Jeff Cornilles (R).

Sterling Barnett

Sterling Barnett (Democratic) is a candidate for the Idaho House of Representatives in District 12A (Canyon County) in the November 3, 2026 general election. Sterling Barnett qualified with the Idaho Secretary of State (VoteIdaho.gov) to appear on the November 3, 2026 general election ballot for House District 12A.

Jeff Cornilles

Jeff Cornilles (Republican) is the incumbent member of the Idaho House of Representatives representing District 12A (Canyon County), running for re-election in the November 3, 2026 general election. Official legislative biography notes: Fourth-generation Nampa resident; attended Nampa High School and the University of Idaho; small business owner; member of the Nampa Rotary Club; member of the Nampa Chamber of Commerce; serves on the Nampa Impact Fee Advisory Committee; serves as a commissioner on Nampa Development Corporation (NDC), Nampa’s Urban Renewal Agency; spouse: Keriann Cornilles; five children; four grandchildren.

Campaign site

“We attend and are active at Lakeview Bible Church. I have always been a big supporter of this community. I support our Police and Fire Departments. I support the Nampa Boys and Girls Club, Breaking Chains Academy of Development Inc. and the local Salvation Army. I am a member of the Rotary Club and have been a member of the Nampa Chamber of Commerce for many years. I was recently appointed to Nampa’s Impact Fee committee and am a commissioner on the Nampa Development Corporation. (Nampa's Urban Renewal).” (Ballotpedia Candidate Connection survey)
“I am a forth generation Idahoan and a fiscally conservative republican. Born and raised in Nampa I have spent most of my life involved in my community giving back any way I can.” (Ballotpedia Candidate Connection survey)
“In Education I support parental rights when it comes to their children's education, and will always support our teachers and the amazing work they do on a day to day basis.” (Ballotpedia Candidate Connection survey)

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