Cliffside Park is a city in Bergen County, New Jersey, United States.

Population (year 2000): 23,007 P
Median age: 40 yrs
Land area: 1 sq miles
Median Income: $46,288

The form of government is mayor and council. There are six council members, with two elected every year to three-year terms on a staggered basis. The mayor serves a four-year term

New Jersey Transit bus lines 22, 156, 159, 181, 751, and 755 serve Cliffside Park. Palisade Avenue and Anderson Avenue are the main roads of Cliffside Park.

Scenes from the 1988 film Big, starring Tom Hanks and directed by Penny Marshall, were filmed in Cliffside Park.