Clifton is a city in Passaic County, in the U.S. state of New Jersey. Criss-crossed by several major highways, the city is a regional commercial hub for North Jersey and is a bedroom suburb of New York City in the New York Metropolitan Area. As of the 2020 United States Census, the city retained its position as the state's 11th-most-populous municipality, just behind 2020 #10 Trenton, and well ahead of 2020 #12 Cherry Hill, with a population of 90,296, reflecting an overall increase of 6,160 (+7.3%) from the 2010 census count of 84,136, which in turn reflected an overall increase of 5,464 (+6.9%) from the 78,672 counted in the 2000 census. The Census Bureau's Population Estimates Program calculated that the city's population was 88,709 in 2022, reflecting an overall decrease of 1,587 (1.8%) from the 90,296 counted in the 2020 census and ranking the city the 388th-most-populous in the country.

Passaic County is a county in the U.S. state of New Jersey that is part of the New York metropolitan area. As of the 2020 United States census, the county was the state's eighth-most-populous county, with a population of 524,118, its highest decennial count ever and an increase of 22,892 (+4.6%) from the 2010 census count of 501,226, which in turn reflected an increase of 12,177 (+2.5%) from the 489,049 counted in the 2000 census. The most populous place in Passaic County is Paterson, with 159,732 residents at the 2020 Census, more than 30% of the county's population, while West Milford covered 80.32 square miles (208.0 km2), the largest total area of any municipality and more than 40% of the county's area. The county is part of the North Jersey region of the state.