Horace Mann School is a private, independent college-preparatory school in the Bronx, founded in 1887. Horace Mann is a member of the Ivy Preparatory School League, educating students from the New York metropolitan area from nursery school to the twelfth grade. The Upper, Middle, and Lower Divisions are located in Riverdale, a neighborhood of the Bronx, while the Nursery School is located in Manhattan. The John Dorr Nature Laboratory, a 275 acres (111 ha) campus in Washington Depot, Connecticut, serves as the school's outdoor and community education center. Tuition for the 2023–24 school year from pre-kindergarten through grade twelve is $61,900 per annum, not including some additional fees, one of which exceeds $1,000.

Riverdale is a residential neighborhood in the northwestern portion of the New York City borough of the Bronx. Riverdale, which had a population of 47,850 as of the 2000 United States Census, contains the city's northernmost point at the College of Mount Saint Vincent. Riverdale's boundaries are disputed, but it is commonly agreed to be bordered by Yonkers to the north, Van Cortlandt Park and Broadway to the east, the Kingsbridge neighborhood to the southeast, either the Harlem River or the Spuyten Duyvil neighborhood to the south, and the Hudson River to the west. Riverdale Avenue is the primary north–south thoroughfare through Riverdale.