Adel (population 6,153) is located at the intersection of U.S. Highways 6 and 169. Adel became an associate member of Region XII in December of 2012.
De Soto (population 918) is located along Interstate 80 in southern Dallas County. De Soto became an associate member of Region XII in July 2020.
Perry (population 7,836) is located in Dallas County approximately 12 miles east of Jamaica on Iowa Highway 141. The City has been an associate member of Region XII since July of 2002.
Redfield (population 731) is located along U.S. Highway 6 in southwestern Dallas County approximately 12 miles northeast of Stuart and eight miles southeast of Linden. Redfield became an associate member of Region XII in September of 1995.
Woodward (population 1,346) is located in the northeast corner of Dallas County twenty-five miles north of Des Moines along Iowa Highway 141. Woodward became an associate member of Region XII in July of 2021.