Cape St. Claire, a suburb of Annapolis, is a covenanted,[2] unincorporated community as well as a census-designated place (CDP) in Anne Arundel County, Maryland, United States.

In the early part of the 20th century, Hugh H. Young, a prominent doctor on the staff of Johns Hopkins University, began buying up the farmland with the intention of building a community.

Dr. Young's first attempt, a community called Persimmon Point, was less than successful, with only a few lots being sold.

Upon Dr. Young's death, his children created the River Bay Company to manage the property for development.

To manage the affairs of the new community, the River Bay Company created and incorporated the Cape St. Claire Club, governed by a Board of Governors.

The Board consisted of three representatives of the River Bay Company named in the Cape St. Claire Club certificate of incorporation: John G. Rouse, Jr.; James C. Morton, Jr.; and George W. Baker, Jr. James C. Morton was elected Chairman.

In April 1989, the Anne Arundel County Council approved the formation of the Cape St. Claire Special Community Benefits District.

This special benefits district has allowed the community to purchase additional common property, build a specially-designated fishing/crabbing pier, make improvements to community assets, and hire off-duty county police for additional security.