The second USS Calumet (SP-723) was a United States Navy patrol vessel in commission from 1917 to 1919.

Calumet as a private yacht sometime between 1903 and 1917.
History
United States
Name	USS Calumet
Namesake	Previous name retained
Builder	George Lawley & Son, Neponset, Massachusetts
Completed	1903
Acquired	9 September 1917
Commissioned	7 December 1917
Decommissioned	11 January 1919
Fate	Returned to owner January 1919 Scrapped 1929
Notes	Operated as private yacht Calumet 1903–1917 and 1919–1929
General characteristics
Type	Patrol vessel
Tonnage	153 Gross register tons
Length	147 ft (45 m)
Beam	17 ft 5 in (5.31 m)
Draft	7 ft 9 in (2.36 m)
Propulsion	Steam engine
Speed	11 knots
Complement	42
Armament	2 × 6-pounder guns

Calumet was built as a private steam yacht of the same name in 1903 by George Lawley & Son at Neponset, Massachusetts. On 9 September 1917, the U.S. Navy acquired her under a free lease from her owner for use as a section patrol boat during World War I. She was commissioned as USS Calumet (SP-723) on 7 December 1917.

Assigned to the 3rd Naval District, Calumet served for the rest of World War I as a guard ship and harbor entrance patrol craft in the New York City area and provided local antisubmarine escort in the vicinity of New York Harbor for inshore convoys as they voyaged along the United States East Coast.

Calumet was decommissioned at New York City on 11 January 1919 and returned to her owner. She remained in private use as a yacht until scrapped in 1929.