The Chiwawa-class oilers were United States Navy T3 Tanker oilers of the T3-S-A1 design built during World War II at Bethlehem Sparrows Point Shipyard of Sparrows Point, Maryland.

All of the ships of the class initially were to be built for private companies, but the outset of World War II, the ships were transferred to the United States Maritime Commission and given new names.

Three of the ships — Chiwawa (AO-68), Escalante (AO-70), and Neshanic (AO-71) — were decommissioned at the end of the war.

Chiwawa (now Lee A. Tregurtha) is still in commercial service on the Great Lakes.

[2] Enoree[3][4] and Niobrara[5] were both eventually scrapped while Escalante, then known as George MacDonald, sank in 1960.