NACo works with a number of groups to assist and enhance services to counties. Those groups include NACo affiliates, state associations of counties and other associations that have county officials as members.
NACo affiliate organizations are aligned with departments within the county government structure. Members of the affiliates are county staff that perform a specific job within a county. There are affiliates for administrators, attorneys, health officials, engineers, recorders and clerks, information officers, treasurers, and planners. There are procedures and criteria in place for becoming an affiliate, which includes a vote of the membership at the NACo Annual Conference. Each affiliate has one representative on the NACo/NACoRF Board of Directors.
State associations provide counties with a wide range of services, including legislative representation, research, training, consultation and publications. Out of the 50 states, 47 states have at least one state association. There are a total of 53 state associations with some states may having more than one association.