SS Frontenac Victory was a Victory ship built for the United States War Shipping Administration late in World War II under the Emergency Shipbuilding program. It saw service in the European Theater of Operations in the Atlantic Ocean during 1945, and in the immediate post-war period. SS Frontenac Victory was part of the series of Victory ships named after cities; this particular ship was named after the city of Frontenac, Missouri. It was a type VC2-S-AP2/WSAT cargo ship with the U.S. Maritime Commission (MARCOM), "Victory" (MCV) hull number 625, shipyard number 1597, and built by Bethlehem Shipbuilding Corporation in Baltimore, Maryland.

SS Frontenac Victory was one of many new 10,500-ton vessels to be known as Victory ships, designed to replace the earlier Liberty ships. Liberty ships were designed to be used solely for World War II, whereas Victory ships were designed to last longer and to serve the US Navy after the war. Victory ships differed from Liberty ships in that they were faster, longer, wider, taller, had a thinner stack set farther toward the superstructure and had a long raised forecastle.

On March 1, 1945, Frontenac Victory collided with the gasoline tanker SS Lone Jack in the Atlantic. The two ships had departed from the US with supplies for the war in Europe, when they collided at 37.42N 57.53W, about 1,000 miles (1,600 km) east of Virginia. Their distress calls were heard by a convoy returning to New York City. The convoy was about 150 nautical miles (280 km; 170 mi) away and its task group commander, Captain Poole, sent two of the convoy's destroyer escorts: USS Hammann and USS Robert E. Peary.

Frontenac Victory had a 30-foot (9.1 m) hole in her bow, but did not sink. Lone Jack had a 30-foot-square (9.1 m) hole in her side, causing her steam engine room to flood. Due to rough seas, the destroyer escorts could not help the ships when they arrived, other than to protect them from potential enemy U-boats. Late in the afternoon of March 2, the captain of Lone Jack gave the order to abandon ship as the tanker had no power and was adrift.

On March 3, Lone Jack was still afloat and a team from USS Hammann was sent to check its seaworthiness. After examination, it was declared she was worth saving, though she was low in the water. Two salvage tugs, USS Kiowa and USS Escape, towed Lone Jack back to port. USS Hammann escorted the three ships back to the US.

Frontenac Victory returned to the US under her own power, and under the protection of USS Robert E. Peary. Frontenac Victory was repaired and put back in service.

In 1946, after World War II, Frontenac Victory was converted to a livestock ship, also called a cowboy ship. From 1945 to 1947, the United Nations Relief and Rehabilitation Administration and the Brethren Service Committee of the Church of the Brethren sent livestock to war-torn countries. These "seagoing cowboys" made about 360 trips on 73 different ships. The Heifers for Relief project was started by the Church of the Brethren in 1942; in 1953, this became Heifer International. Frontenac Victory made four trips moving horses, heifers, and mules, as well as a some chicks, rabbits, and goats. Her trips were to Greece, Poland and Yugoslavia.

After the war, in 1947, Frontenac Victory was laid up at James River as part of the National Defense Reserve Fleet.