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The school district is traceable to 1922, when a single elementary facility opened on Deer Park's Center Street along Highway 225. In 1929, the small school (approximately 30 students) was greatly expanded, and additional facilities were created in neighboring areas. The district was officially formed for the school year of 1930. Today, it serves most of Deer Park, a portion of Pasadena and La Porte, and the unincorporated area of Lynchburg. Its total enrollment is approximately 12,300 students.
Cleveland ISD extends into portions of Montgomery and San Jacinto counties, and Tomball ISD extends into portions of Montgomery County. Other districts in those counties are served by Region 6 ESC.