Pittsburgh Public Schools is the public school district serving the city of Pittsburgh, Pennsylvania (except for two small parts served by the Baldwin-Whitehall School District) and adjacent Mount Oliver. As of the 2021–2022 school year, the district operates 54 schools with 4,192 employees (2,070 teachers) and 20,350 students, and has a budget of $668.3 million. According to the district's 2021 budget, based on the 2010 U.S. Census, the combined land area served is 55.3 square miles (143 km2), with a population of 309,359.