The Blackwell School Alliance is a non-profit organization based in Marfa, Texas working to defend and amplify the experiences of the Mexican-American public school experience in Texas during the era of de facto segregation.

The Blackwell School is the former de facto segregated school for Mexican-American school children in Marfa that operated from 1909 until 1966, and is currently operated as a museum.

On October 17, 2022, the Blackwell School was designated a National Historic Site as a unit of the National Park Service.