Newtowne Neck State Park is being developed by the Maryland Department of Natural Resources (DNR). In 2009, the Jesuit Community which owned the 700 acre tract of land, sold it to the state so that the environmentally sensitive, historically rich, and scenically beautiful site could be protected from commercial development.

The St. Francis Xavier Church grounds, including the Manor House, now lie within the boundaries of the park.

Shortly after the DNR opened the park and before a master plan was developed, unexploded ordinance from a World War II testing site was discovered on the shores of the park. This led to a closing of the park and a delay in the planning process as remediation commenced. In late April 2014 much of the park was reopened to the public.

The DNR has a webpage for the park here.