USS Leahy (DLG/CG-16) was the lead ship of a new class of destroyer leaders in the United States Navy. Named for Fleet Admiral William D. Leahy, she was commissioned on 4 August 1962 as DLG-16, a guided missile frigate, and reclassified as CG-16, a guided missile cruiser, on 30 June 1975.

Leahy-class cruisers were a class of guided-missile cruisers built for the United States Navy. They were originally designated as Destroyer Leaders (DLG), but in the 1975 cruiser realignment they were reclassified as guided-missile cruisers (CG).