Parks subseries contains files about all parks developed in the City of Wilmington and New Castle County by William P. Bancroft, the Woodlawn Company, and the Woodlawn Trustees. This includes reports; studies; research papers; and information about Northern Delaware Greenways, Department of Natural Resources and Environmental Control, Division of Parks and Recreation, State Parks, Brandywine Creek State Park, New Castle County Parks, Delaware County Planning Department, and the Jessup Moore/St. Joe's Paper Company tract.

This subseries includes several reports and lists of the lands transferred to the City of Wilmington for parks beginning with the purchase of Brandywine Park in 1886 to 1887. There is evidence in Scharf's History of Delaware of an unsuccessful attempt to create a park in Wilmington earlier in 1868 when funds for a park were not a priority. Much information is included on the development of a park system during the subsequent ninety-three years in the city. Bancroft's creation of the Wilmington Board of Park Commissioners in 1883 is recorded, as well as his subsequent transfer of lands to Wilmington, followed by Woodlawn's later gifts. Also included is Woodlawn's donation in 1981 of 500 acres to the State of Delaware as an addition to the already existing Brandywine Creek State Park. Records are included about the dedication ceremony for BCSP and plans for developing greenways throughout New Castle County. There are records here also regarding park maintenance, funded by a trust fund in Wilmington created in 1935, and another trust fund for maintaining Brandywine Creek State Park.