The Patrick School is an independent co-educational four-year high school in Hillside in Union County, New Jersey, United States. The school was established in 2012 following the closure of St. Patrick High School Academy, which was a co-educational four-year Catholic high school in Elizabeth, New Jersey, that operated under the auspices of the Roman Catholic Archdiocese of Newark and had been founded as a vocational school in 1863 as part of Saint Patrick's Parish in Elizabeth, making it the oldest parochial high school in New Jersey. The Patrick School originally operated on the site in Elizabeth that had been St. Patrick High School and the school has continued to carry on the legacy of its predecessor even after its move to Hillside.

Elizabeth is a city in and the county seat of Union County, in the U.S. state of New Jersey. As of the 2020 United States census, the city retained its ranking as the state's fourth-most-populous city behind neighboring Newark, Jersey City, and Paterson, with a population of 137,298, an increase of 12,329 (+9.9%) from the 2010 census count of 124,969, which in turn reflected an increase of 4,401 (3.7%) from the 120,568 counted in the 2000 census.