Collingswood is a borough in Camden County, in the U.S. state of New Jersey, located 5 miles (8.0 km) east of Center City Philadelphia. As of the 2020 United States census, the borough's population was 14,186, an increase of 260 (+1.9%) from the 2010 census count of 13,926, which in turn reflected a decline of 400 (−2.8%) from the 14,326 counted in the 2000 census.