Holy Spirit Preparatory School (abbreviated HSP) is an independent, Roman Catholic preparatory school located in Atlanta and Sandy Springs, Georgia. It was originally established in 1996 as Donnellan School.

Pre-K4 through 7th grade are located on a multi-acre site at 4820 Long Island Drive. The preschool program is located at 4465 Northside Drive on the lower level of Holy Spirit Catholic Church, adjacent to the 57,000 sq ft (5,300 m²) Upper School campus, which opened in the fall of 2005.^{[citation needed]}

The elementary campus is in Sandy Springs while the preschool and upper school are in Atlanta.

Although an independent Catholic school, it is closely tied to Holy Spirit Catholic Church. The pastor of the parish, Monsignor Edward Dillon, serves on the school board.

Holy Spirit Preparatory School offers a classically inspired curriculum in Latin, and instructs students in Catholic theology as well as typical college preparatory subjects and numerous electives.

The school's Classics department describes its program as being "designed around an awareness of the historical significance of the Greek and Latin languages as foundations for the Western intellectual tradition and the history of the Catholic Church."

Upper School students are also required to complete community service and "school service" hours in order to graduate.

The school offers a number of student athletics programs, including cross country running, soccer, baseball, basketball, cheer leading, clay targets, golf, swimming, tennis, track and field, and volleyball.