Idaho uses a six-member, bipartisan Commission for Reapportionment to draw both congressional and state legislative districts under the state constitution. Following the 2020 census, the commission adopted Congressional Plan C03 on November 5, 2021, reaffirmed the vote on November 10, and filed its final report with the Secretary of State on November 12. The Idaho Supreme Court later rejected a challenge alleging the commission missed its deadline and could not depart from precinct lines, holding on February 11, 2022, that the filing was timely and that precincts need not be retained in the congressional plan. These actions left the commission’s congressional map in effect beginning with the 2022 elections.

For the legislature, the commission adopted legislative Plan L03 on November 5, 2021, and reaffirmed it on November 10. Multiple petitions (including Durst and filings by tribal leaders and Ada County) argued the plan split too many counties and violated Idaho’s redistricting criteria. On January 27, 2022, the Idaho Supreme Court unanimously upheld Plan L03, concluding that the county splits were reasonably necessary to satisfy the equal-population requirements and that the commission had complied with constitutional and statutory mandates. The districts have governed Idaho elections since 2022.

last updated: Oct. 2025