District 4 is a newly created County Supervisor district created by the Iowa state legislature in 2025 under Senate File 75. This law required counties with Iowa Regents' Universities to be districted. This law impacted 3 counties: Johnson, Blackhawk, and Story.

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Not sure which district you are in? Here is the county auditor's webpage, where you can find voter information and an interactive map: https://johnsoncountyiowa.gov/supervisor-districts​