Under Senate File 75 (passed in 2025), Black Hawk County is required to elect county supervisors by district, instead of the at large system used in past elections.
The district map was prepared by the Legislative Service Agency and released on December 4, 2025. It was approved by the Board of Supervisors on December 15, 2025, and received final approval by the Iowa Secretary of State on December 29, 2025.
Black Hawk County Supervisor District Map
Additional Supervisor District Maps
Legislative Services Agency Report on Districts
All five supervisors currently in office will serve until the end of 2026.
All five new supervisor districts will be on the 2026 primary and general election ballots. Districts 2 and 3 will have two-year terms, and districts 1, 4 and 5 will have four-year terms. Term lengths were determined by random drawing on January 20. Candidates must live in their districts, and voters will only vote in the contest for their own district. Candidates for a supervisor district must file an affidavit of candidacy along with nomination petitions containing at least 50 signatures from eligible electors in the district. For additional candidate information
County supervisor elections will return to four-year staggered terms beginning in 2028, with districts 2 and 3 on the ballot that year and districts 1, 4, and 5 on the ballot in 2030. District boundaries will be redrawn in 2031 based on the 2030 census.
District 1 Precincts:
Big Creek/Spring Creek/La Porte, Black Hawk/Cedar Falls/Lincoln, Cedar/Poyner2/Gilbertville, Eagle/Orange, Hudson, Precinct X202 (CF W2P2), Precinct X203 (CF W2P3), Precinct X301 (CF W3P1), Precinct X302 (CF W3P2), Precinct X303 (CF W3P3), Union/Washington/Janesville
District 2 Precincts:
Barclay/Bennington/Lester/Dunkerton, Elk Run Heights, Evansdale Ward 1, Evansdale Ward 2, Evansdale Ward 3, Evansdale Ward 4, Mt Vernon, Poyner1/East Waterloo/Raymond/Fox/Jesup, Precinct W203 (WL W2P3), Precinct W204 (WL W2P4), Precinct W205 (WL W2P5), Precinct W206 (WL W2P6), Precinct W404 (WL W4P4), Precinct W405 (WL W4P5), Precinct W406 (WL W4P6)
District 3 Precincts:
Precinct X101 (CF W1P1), Precinct X102 (CF W1P2), Precinct X103 (CF W1P3), Precinct X201 (CF W2P1), Precinct X401 (CF W4P1), Precinct X402 (CF W4P2), Precinct X403 (CF W4P3), Precinct X501 (CF W5P1), Precinct X502 (CF W5P2), Precinct X503 (CF W5P3)
District 4 Precincts:
Precinct W101 (WL W1P1), Precinct W301 (WL W3P1), Precinct W302 (WL W3P2), Precinct W303 (WL W3P3), Precinct W304 (WL W3P4), Precinct W305 (WL W3P5), Precinct W306 (WL W3P6), Precinct W401 (WL W4P1), Precinct W402 (WL W4P2), Precinct W403 (WL W4P3), Precinct W501 (WL W5P1), Precinct W502 (WL W5P2)
District 5 Precincts:
Precinct W102 (WL W1P2), Precinct W103 (WL W1P3), Precinct W104 (WL W1P4), Precinct W105 (WL W1P5), Precinct W106 (WL W1P6), Precinct W201 (WL W2P1), Precinct W202 (WL W2P2), Precinct W503 (WL W5P3), Precinct W504 (WL W5P4), Precinct W505 (WL W5P5), Precinct W506 (WL W5P6)
