USS Marengo (AK-194) was an Alamosa-class cargo ship that was constructed by the US Navy during the closing period of World War II.

Marengo (AK 194) was laid down under a Maritime Commission contract, MC hull 2125, by Walter Butler Shipbuilders Inc., Superior, Wisconsin, 4 July 1944; launched 4 December 1944; sponsored by Mrs. R. W. Higgins; acquired by the Navy at New Orleans, Louisiana, 24 August 1945; placed in service the same day she was acquired, and was used for ferrying from Beaumont, Texas, to Galveston, Texas.

The ship was subsequently operated by North Atlantic & Gulf Steamship Co., under the name Coastal Spartan.

[3] Coastal Spartan was contracted to North Atlantic & Gulf SS Company and South Atlantic SS Line until being laid up in the reserve fleet in Wilmington, North Carolina, on 22 April 1948.

[2] She was sold in 1989, converted by the Eastern Shipbuilding Company, Panama City, Florida, to a fish processing vessel in 1989–1990.