Garland Independent School District is a public school district with its headquarters in the Harris Hill Administration Building in Garland, Texas, United States. Garland ISD extends from the Dallas city limits, northeast to the county line and serves parts of the communities of Garland, Rowlett, and Sachse. Small portions of Dallas and Wylie are served by Garland ISD. In 2009, the school district was rated "academically acceptable" by the Texas Education Agency.