The City of Mason City has 3 unions representing certain groups of City employees:
AFSCME Local 1367 - Representing Operations and Maintenance Department employees other than management and administrative staff, Water Supply Division employees other than management staff, Library employees other than management staff, and Cemetery employees other than management and administrative staff.
IAF Local 41 - Representing Fire Department employees other than management and administrative staff.
Teamsters Local 238 - Representing Police Department employees other than management and administrative staff.
All remaining City staff, both full-time, part-time and seasonal employees are considered non-bargaining employees.