Bergen County is the most populous county in the U.S. state of New Jersey. As of the 2020 United States census, the county's population was 955,732, its highest decennial count ever and an increase of 50,616 (+5.6%) from the 905,116 recorded at the 2010 census, which in turn had reflected an increase of 20,998 (2.4%) from the 884,118 counted at the 2000 census. Located in the northeastern corner of New Jersey and its Gateway Region, Bergen County and its many inner suburbs constitute a highly developed part of the New York City metropolitan area, bordering the Hudson River; the George Washington Bridge, which crosses the Hudson, connects Bergen County with Manhattan. The county is part of the North Jersey region of the state.
The county is divided into 70 municipalities; made up of 56 boroughs, nine townships, three cities, and two villages. Its most populous place, with 46,030 residents as of the 2020 census, is Hackensack, which is also its county seat. Mahwah covers the largest area of any municipality, at 26.19 square miles (67.8 km2).Bergen County is one of the largest commercial hubs in both New Jersey and the United States, generating over $6 billion in annual revenues from retailers in Paramus alone, despite blue laws keeping most stores in the county open only six days per week. The county is one of the wealthiest counties in the United States, with a median household income of $109,497 (compared to $89,703 in New Jersey and $69,021 nationwide) and a per capita income of $55,710 (vs. $46,691 in the state and $37,638 in the U.S.) as of the 2017–2021 American Community Survey. Bergen County has some of the highest home prices in New Jersey, with the median home price in 2022 exceeding $600,000. The county's park system covers more than 9,000 acres (3,600 ha).