The Board of Supervisors is an elective office with a four-year term. The Board follows the Plan Three supervisor district representation plan as defined in Chapter 331.206 of the Code of Iowa. Supervisors are elected from single-member equal-population districts, in which the electors of each district shall elect one member who must reside in that district.

The Board of Supervisors holds its organizational meeting on the first day in January which is not a Saturday, Sunday or holiday. Regular sessions of the Board of Supervisors are held at 10:00 a.m. on Tuesday mornings. The duties of the Board of Supervisors can be found throughout Chapter 331 in the Code of Iowa.