Medina Valley Independent School District is a public school district based in Castroville, Texas.
In addition to Lacoste, the district also serves the city of Castroville, LaCoste, and the surrounding area.
Located in Medina County,[1] a small portion of the district extends into Bexar County.
[2] In 2022, the school district was rated "A" by the Texas Education Agency.
[3] By 2024 the population of the school district increased.