USS ''Union'' has been the name of more than one ship in the United States Navy, and may refer to:
*, an experimental steamer in commission from 1843 to 1847
*, a schooner captured from Mexico in November 1846 and wrecked in December 1846
*, an armed screw steamer in commission in 1861 and from 1863 to 1865
*, an attack cargo ship in commission from 1945 to 1970
{{DEFAULTSORT:Union, Uss
United States Navy ship names