Cresskill is a borough in Bergen County, New Jersey, United States. As of the 2010 United States Census, the borough's population was 8,573, reflecting an increase of 827 (+10.7%) from the 7,746 counted in the 2000 Census, which had in turn increased by 188 (+2.5%) from the 7,558 counted in the 1990 Census. This town got its name from "Cress", referring to the watercress which grew in its streams, and "Kill", referring to the stream passing through.
Cresskill was incorporated as a borough by an act of the New Jersey Legislature on May 8, 1894, from portions of Palisades Township. The borough was formed during the "Boroughitis" phenomenon then sweeping through Bergen County, in which 26 boroughs were formed in the county in 1894 alone. A portion of the borough was annexed by Alpine in 1904.
Railroads provided access from Cresskill to customers in New York City, including a chicken hatchery that was the world's largest by 1897. Railroad access established the former Camp Merritt as a major debarkation point for more than a million American troops being sent abroad to fight in World War I. To commemorate the fact, a large obelisk memorial (referred to by locals as "The Monument"), or "The Circle Monument" was dedicated in 1924, set in the center of the Camp Merritt Memorial Circle at the intersection of Madison Avenue and Knickerbocker Road (CR 505).
Sites in the borough listed on the National Register of Historic Places include:
According to the United States Census Bureau, the borough had a total area of 2.074 square miles (5.371 km2), including 2.064 square miles (5.345 km2) of land and 0.010 square miles (0.027 km2) of water (0.50%).
The borough, a suburb of New York City, borders the Bergen County municipalities of Alpine, Bergenfield, Demarest, Dumont and Tenafly.
The 2010 United States Census counted 8,573 people, 3,002 households, and 2,317.544 families in the borough. The population density was 4,154.5 per square mile (1,604.1/km2). There were 3,114 housing units at an average density of 1,509.0 per square mile (582.6/km2). The racial makeup was 68.95% (5,911) White, 0.73% (63) Black or African American, 0.03% (3) Native American, 27.64% (2,370) Asian, 0.01% (1) Pacific Islander, 1.07% (92) from other races, and 1.55% (133) from two or more races. Hispanic or Latino of any race were 6.26% (537) of the population.