The second USS Monadnock was an iron-hulled, twin-screw, double-turreted monitor of the Amphitrite class in the United States Navy which saw service in the Spanish–American War.

On June 23, 1874, in response to the Virginius Incident, President Ulysses S. Grant's Secretary of Navy George M. Robeson ordered the Monadnock laid down (scrapped and reconstructed) contracted by Phineas Burgess at the Continental Iron Works, Vallejo, California; launched 19 September 1883; completed at Mare Island Navy Yard; and commissioned there 20 February 1896, Captain George W. Sumner in command, Lt. Cdr.

She departed San Francisco, California, on 23 June 1898, touched at Hawaii early in July, and reached Manila Bay on 16 August.

On 26 December she sailed for Hong Kong, and for the next five years cruised the rivers of China, particularly the Yangtze, and along her coast to protect American interests.

Decommissioning for the last time 24 March 1919, her name was struck off the Navy list on 2 February 1923, and her hull was sold, on the Asiatic Station, 24 August 1923.