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 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.

On October 17, 2022, the Blackwell School was designated a National Historic Site as a unit of the National Park Service. In July 2024, the site was transferred to the National Park Service, which has since assumed operations of the Blackwell School National Historic Site.