Iowa Code § 49.30: All candidates and issues on one ballot — exceptions.

1. All constitutional amendments, all public measures, and the names of all candidates, other than presidential electors, to be voted for in each election precinct, shall be printed on one ballot, except that separate ballots are authorized when it is not possible to include all offices and public measures on a single ballot. In the event that it is not possible to include all offices and public measures on a single ballot, separate ballots may be provided for nonpartisan offices, judges, or public measures.

2. If printed on the same ballot, the offices of political subdivisions shall, if applicable, be printed in the following order:

a. Those of a county.

b. Those of a city.

c. Those of a school district.

d. Those of a merged area.

e. Those of any other political subdivision.

3. If printed on the same ballot, the public measures of political subdivisions shall be printed in the same order as provided for offices of the political subdivisions.