Kinney County is a county located in the U.S. state of Texas. As of the 2020 census, its population was 3,129. Its county seat is Brackettville. The county was created in 1850 and later organized in 1874. It is named for Henry Lawrence Kinney, an early settler.

Fort Clark was a frontier fort located just off U.S. Route 90 near Brackettville, in Kinney County, Texas, United States. It later became the headquarters for the 2nd Cavalry Division. The Fort Clark Historic District was added to the National Register of Historic Places on December 6, 1979. The Commanding Officer's Quarters at Fort Clark were designated a Recorded Texas Historic Landmark in 1988. The Fort Clark Guardhouse became a Recorded Texas Historic Landmark in 1962. The Fort Clark Officers' Row Quarters were designated a Recorded Texas Historic Landmark in 1991.