Reagan County Independent School District (RCISD) is a public school district based in Big Lake, Texas. As of the 2021–2022 academic year, RCISD serves approximately 812 students across three campuses:

Reagan County Elementary School: Grades PK–5
Reagan County Middle School: Grades 6–8
Reagan County High School: Grades 9–12
The district is committed to fostering opportunity, innovation, and individual excellence among its students.