[5] The park preserves the site of the March 23, 1634, landing of Maryland's first colonists, who had sailed from Cowes on the Isle of Wight in England four months earlier.

[6][7] On March 25, the colonists celebrated a mass of thanksgiving for their safe arrival and this date is commemorated annually as Maryland Day.

[8][9] The island was a convenient, temporary base of operations for the 150 settlers as they negotiated with the Yaocomico Native Americans for land for a permanent settlement.

[13] In 1962, the property was designated as a state park when it was leased from the Federal government and its name reverted to St. Clement's Island.

[1] The island's 40-foot stone cross was erected in 1934 in celebration of Maryland's 300th anniversary, recognizing the location as one of the foundation sites of religious toleration in the United States.