Iowa Code Title II. Elections and Official Duties [Chs. 39-79] § 43.52. Nominees for county office

1. a. The nominee of each political party for any office to be filled by the voters of the entire county, or for the office of county supervisor elected from a district within the county, shall be the person receiving the highest number of votes cast in the primary election by the voters of that party for the office, and that person shall appear as the party's candidate for the office on the general election ballot.

b. If no candidate receives thirty-five percent or more of the votes cast by voters of the candidate's party for the office sought, the primary is inconclusive and the nomination shall be made as provided by section 43.78, subsection 1, paragraphs “d” and “e”.