卡多县（Caddo County, Oklahoma）是美国奥克拉荷马州西部的一个县。面积3,342平方公里。根据美国2000年人口普查，共有人口30,150人。县治阿纳达科 (Anadarko)。

成立于1901年8月6日。县名来自卡多人。

Caddo County is a county located in the U.S. state of Oklahoma. As of the 2010 census, the population was 29,600. Its county seat is Anadarko. Created in 1901 as part of Oklahoma Territory, the county is named for the Caddo tribe who were settled here on a reservation in the 1870s. Caddo County is immediately west of the seven-county Greater Oklahoma City metro area, and although is not officially in the metro area, it has many economic ties in this region.