USS Belknap (DLG-26/CG-26), named for Rear Admirals George E. Belknap (1832–1903) and his son Reginald Rowan Belknap (1871–1959), was the lead ship of her class of guided missile cruisers in the United States Navy. She was launched in 1963 as DLG-26, a guided missile frigate under the then-current designation system, and reclassified as CG-26 on 30 June 1975.

The Belknap-class cruiser was a class of single-ended guided-missile cruisers built for the United States Navy during the 1960s. They were originally designated as DLG frigates, but in the 1975 fleet realignment, they were reclassified as guided missile cruisers (CG).