Johnson County is a full service local government providing daily services. In addition to the traditional governmental operations of public health and safety, codes regulations, and tax collection, Johnson County operates a major intermodal transportation system, twelve libraries, six multi-service centers, a park and recreation district, mental health and developmental support centers, a community corrections program, and a countywide wastewater system.

Johnson County Government utilizes direct citizen input through public meetings and volunteered service on governing and advisory boards and commissions to ensure the continued vitality and efficiency of its services and programs.

The County Manager's Office is responsible to the Board of County Commissioners and the residents of Johnson County for the effective and efficient delivery of programs and services, using sound management and financial principles while emphasizing high ethical values, innovation, and continuous improvement.