The first USS Arcadia (SP-856) was a motorboat that may have seen brief service as a United States Navy patrol vessel in late 1918.

Arcadia was built as a private wooden motorboat of the same name in 1915 by Frank S. Terry at Brooklyn, New York.

In 1917, the U.S. Navy chartered her from her owner for use as a section patrol boat during World War I and took delivery of her on 8 October 1918.

No logbooks exist to confirm that she was commissioned as USS Arcadia (SP-856) or to describe the extent and nature of her U.S. Navy service.

This article about a specific ship or boat of the United States Armed Forces is a stub.