An independent school district (ISD) is a type of school district in some US states for primary and secondary education that operates as an entity independent and separate from any municipality or county, and only under the oversight of the respective state government. As such, the administrative leadership of such districts is selected from within the district itself and has no direct responsibility to any other governmental authority. This independence normally also implies that the district has its own taxing authority that is outside the direct control of other governmental entities.

Stafford Municipal School District (SMSD) is a school district based in Stafford, Texas, United States in Greater Houston. The district covers all of the city of Stafford and is controlled by the city, making it the only school district in Texas that is not an independent school district operated by an independent school board.