Hanover Park, located in Cook and DuPage counties in Illinois, is a suburban village of Chicago with a population of 37,470 according to the 2020 census. Ontarioville is one of the neighborhoods in this village.

Hanover Park can be found at the coordinates 41°58′44″N 88°8′46″W, which translates to 41.978827° north latitude and -88.146109° west longitude.

Hanover Park encompasses a total area of 6.53 square miles, as per the 2021 census gazetteer files. Out of this, an expanse of 6.42 square miles constitutes land, accounting for 98.42% of the total area. The remaining 0.10 square miles, making up 1.58%, is covered by water.

The town is covered by multiple school districts, including Elgin Area School District U46, serving a 90-square-mile area in Cook, DuPage, and Kane Counties with nearly 40,000 students. U-46 is the second largest school district in Illinois after Chicago Public Schools. Other districts serving Hanover Park are Schaumburg Township Elementary School District 54, Township High School District 211, Community Consolidated School District 93, Glenbard Township High School District 87, Keeneyville School District 20, and Lake Park High School District 108. Six public high schools in total serve the village: Streamwood High School, Bartlett High School, Schaumburg High School, Hoffman Estates High School, Lake Park High School, and Glenbard North High School.

Hanover Park enjoys convenient access to the city via its own station on Metra’s Milwaukee District West Line, which offers regular rail service between Elgin and Chicago’s Union Station. As part of Metra’s fare system, Hanover Park falls within zone F.

Pace offers bus transportation along Route 554 that links Hanover Park with Elgin, Schaumburg, and various other locations.

Eminent inhabitants
Jeffrey and Jill Erickson, infamous bank robbers
Christopher Kolk, renowned celebrity and fashion photographer
Jon Walker, accomplished bassist and guitarist of Panic! At The Disco and The Young Veins
Nadia Ianakieva, esteemed author of The Red Dress Decision
Eira L. Corral Sepulveda, trailblazing Latina and youngest elected official of the Metropolitan Water Reclamation District.

The Hanover Park Park District was created in 1964 by the residents of Hanover Park. This district manages and oversees the upkeep of parks and park amenities, with five commissioners elected to govern it for overlapping four-year terms.

The Hanover Park Park District oversees 21 park locations that cover a total of 128 acres (0.52 km2).

The Poplar Creek Public Library District encompasses the Schaumburg Township District Library, which serves the area of Hanover Park in Schaumburg Township, Cook County. This includes the region east of Barrington Road and north of Barrington and Lake Streets. Additionally, the Hanover Park Park District is also part of the Poplar Creek Public Library District.

Sister relationship with Ghana Cape Coast, Ghana and Valparaíso in Mexico.