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