Colonial Park is an unincorporated community and census-designated place in Lower Paxton Township, Pennsylvania, United States. The population was 13,229 at the 2010 census. It is part of the Harrisburg–Carlisle Metropolitan Statistical Area. It uses the Harrisburg ZIP code of 17109 and hosts a great deal of the area's retail activity, …Colonial Park is an unincorporated community and census-designated place in Lower Paxton Township, Pennsylvania, United States. The population was 13,229 at the 2010 census. It is part of the Harrisburg–Carlisle Metropolitan Statistical Area. It uses the Harrisburg ZIP code of 17109 and hosts a great deal of the area's retail activity, including the Colonial Park Mall.