Rule is a town in Haskell County, Texas, United States. The population was 636 at the 2010 census, down from 698 at the 2000 census.

Haskell County is a county located in the U.S. state of Texas. As of the 2020 census, its population was 5,416. The county seat is Haskell. The county was created in 1858 and later organized in 1885. It is named for Charles Ready Haskell, who was killed in the Goliad massacre.