
USS Beaverhead (AK-161) was an Alamosa-class cargo ship commissioned by the U.S. Navy for service in World War II. She was responsible for delivering troops, goods and equipment to locations in the war zone.

USNS Big Horn (T-AO-198) is a Henry J. Kaiser-class fleet replenishment oiler of the United States Navy.

USS Billings (LCS-15) is a Freedom-class littoral combat ship of the United States Navy. It is the first ship in naval service named after Billings, Montana.

USS Broadwater (APA-139) was a Haskell-class attack transport built for the United States Navy during World War II. Named for Broadwater County, Montana, she was the only U.S. Naval vessel to bear the name.
The second USS Butte (AE-27) was a Kilauea-class ammunition ship in the United States Navy. She was laid down 21 July 1966 by General Dynamics Quincy Shipbuilding Division at Quincy, Massachusetts, and was christened and launched 9 August 1967. She was commissioned on 14 December 1968 in the Boston Naval Shipyard and assigned to the U.S. Atlantic Fleet, originally homeported in Norfolk, Virginia.

USS Dawson (APA-79) was a Gilliam-class attack transport that served with the US Navy during World War II. Commissioned late in the war, she was initially assigned to transport duties and consequently did not participate in combat operations.

USS Fallon (APA-81) was a Gilliam-class attack transport that served with the US Navy during World War II. Commissioned late in the war, she was initially assigned to transport duties and consequently did not participate in combat operations.

USS Helena (CA-75), a Baltimore-class heavy cruiser, was the third ship of the United States Navy to be named for the city of Helena, Montana. She was named Helena while under construction after the cancellation of the light cruiser CL-113.

USS Helena (CL-50) was a Brooklyn-class light cruiser built for the United States Navy in the late 1930s, the ninth and final member of the class. The Brooklyns were the first modern light cruisers built by the US Navy under the limitations of the London Naval Treaty, and they were intended to counter the Japanese Mogami class; as such, they carried a battery of fifteen 6-inch (150 mm) guns, the same gun armament carried by the Mogamis. Helena and her sister St. Louis were built to a slightly modified design with a unit system of machinery and an improved anti-aircraft battery. Completed in late 1939, Helena spent the first two years of her career in peacetime training that accelerated as tensions between the United States and Japan increased through 1941. She was torpedoed at the attack on Pearl Harbor in December 1941 and was repaired and modernized in early 1942.

USS Helena (PG-9) was a Wilmington-class gunboat of the United States Navy. She participated in the Spanish–American War, and served in the Far East for many years. The (PG-9) was the first of five Navy vessels named after the capital city of Montana.

USS Helena (SSN-725), a Los Angeles-class submarine, was the fourth ship of the United States Navy to be named for Helena, Montana. The contract to build her was awarded to the Electric Boat Division of General Dynamics Corporation in Groton, Connecticut on 19 April 1982 and her keel was laid down on 28 March 1985. She was launched on 28 June 1986 sponsored by Mrs. Jean Busey, and commissioned on 11 July 1987, with Commander Thomas Moore in command.

USS Jefferson County (LST-845) was an LST-542-class tank landing ship built for the United States Navy during World War II. Named after counties in 25 states, she was the only U.S. Naval vessel to bear the name.

USS Lake County (LST-880) was an LST-542-class tank landing ship built for the United States Navy during World War II. Named after counties in twelve U.S. states, she was the only U.S. Naval vessel to bear the name.

USS Lincoln County (LST-898) was an LST-542-class tank landing ship built for the United States Navy during World War II. Named after counties in 23 U.S. states, she was the only U.S. Naval vessel to bear the name.

USS Missoula (APA-211) was a Haskell-class attack transport that saw service with the US Navy in World War II. She was a Victory ship design, VC2-S-AP5. She was named after Missoula County, Montana, United States, and was the second ship to bear the name USS Missoula.

USS Montana (ACR-13/CA-13), also referred to as "Armored Cruiser No. 13", later renamed Missoula and reclassified CA-13, was a Tennessee-class armored cruiser of the United States Navy. She was built by the Newport News Drydock & Shipbuilding Co.; her keel was laid down in April 1905, she was launched in December 1906, and she was commissioned in July 1908. The final class of armored cruisers to be built for the US Navy, Montana and her sisters were armed with a main battery of four 10-inch (254 mm) guns, and were capable of a top speed of 22 knots.

USS Richland (AK-207) was an Alamosa-class cargo ship that was constructed for the US Navy during the closing period of World War II. She served in the Pacific Ocean theatre of operations and returned home in 1946, where she was placed into the reserve "mothball" fleet until scrapped in 1972.

USS Shelton (DD-790) was a Gearing-class destroyer of the United States Navy, the second Navy ship named for Ensign James A. Shelton (1916–1942), who was killed in the Battle of Midway.

USS Sheridan (APA-51) was an Ormsby-class attack transport that served with the US Navy during World War II.