Cardston County is a municipal district in southern Alberta, Canada. It is located in Census Division 3 around the Town of Cardston. Cardston County, located in southern Alberta, Canada, boasts a diverse landscape ranging from rolling plains to stunning mountain vistas. Its terrain is influenced by the Waterton River, providing fertile farmland and sceni…Cardston County is a municipal district in southern Alberta, Canada. It is located in Census Division 3 around the Town of Cardston. Cardston County, located in southern Alberta, Canada, boasts a diverse landscape ranging from rolling plains to stunning mountain vistas. Its terrain is influenced by the Waterton River, providing fertile farmland and scenic beauty."