Prosper Independent School District (PISD or Prosper ISD) is a public school district based in Prosper, Texas, United States. Located in Collin County, a portion of the district extends into Denton County.

The district enrollment was 32,197 as of the 2025-26 school year.

The town of Prosper continues to experience large population growth. In the 2018-19 school year, the district enrollment was 14,287 with 1 High School and 2 Middle Schools. In the 2020-21 school year, the enrollment was 19,140 students. In the 2025-26 school year, the enrollment was 32,197 students, with 4 High Schools and 6 Middle Schools in the district.

In 2011, the school district was rated "Recognized" by the Texas Education Agency.

Prosper ISD has its own police department separate from the Town of Prosper Police. This is because PISD covers areas and has schools in six municipalities (Prosper, Texas; Celina, Texas; Frisco, Texas; McKinney, Texas; Aubrey, Texas; Collin County; and Denton County). A Town of Prosper police officer would only have jurisdiction in the town of Prosper, while a PISD officer can cover any school in any area of Prosper ISD.

Prosper School was established in 1902. It had 4 classrooms, 3 teachers, and 100 students. It was sold and moved off in 1910, with a new school opening on the same site in 1911. The new campus had 9 classrooms, 5 teachers, and housed grades 1-10. This school caught fire and was replaced in 1923. The 3rd campus built on this site also had 9 classrooms and 5 teachers, but housed grades 1-11.

Around 1935, Prosper ISD consolidated with many local school districts. These included Richland, Rockhill, Franklin, Hutcherson (White Elephant), Walnut Grove, Pleasant Ridge (Possum Trot), Rheas Mill, and Bloomdale. Some of the buildings from the other schools were moved to the site of Prosper School.

In 1942, the mascot of Prosper School changed from the Deer to the Eagle.