Siouxland Federal Credit Union started in 1967, we currently have over 18,000 members and assets of 180 million. There are 6 ... locations in the Tri-State region and membership is open to those who work/live in the following areas: Union County, SD; Woodbury & Plymouth County, IA; Dakota, Dixon, Cuming Counties in NE, or within a 10-mile radius of Norfolk, NE. read more