Cardston County is a municipal district in southern Alberta, Canada. It is located in Census Division 3 around the Town of Cardston. The municipal district was established on January 1, 1954, through the amalgamation of the Municipal District of Sugar City No. 5 and part of the Municipal District of Cochrane No. 6. On January 1, 2000, the name was changed from Municipal District of Cardston No. 6 to Cardston County