Wallington is a borough in Bergen County, New Jersey, United States. As of the 2010 United States Census, the borough's population was 11,335, reflecting a decline of 248 (-2.1%) from the 11,583 counted in the 2000 Census, which had in turn increased by 755 (+7.0%) from the 10,828 counted in the 1990 Census.
Wallington was created as a borough on January 2, 1895, based on a referendum held on December 31, 1894, from area taken from Bergen Township and Saddle River 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, with Wallington the last of the 26 to be formed by an 1894 referendum. Sections of Wallington were ceded to Garfield in 1898.