VA-21A was an Attack Squadron of the U.S. Navy during World War II. It was established as Bombing Squadron VB-98 on 28 August 1944 and redesignated as VA-21A on 15 November 1946. The squadron was disestablished on 5 August 1947. The squadron's mission was to provide a pool of trained dive-bomber pilots and aircrewmen for assignment as replacements to squadrons operating in the Pacific. The training practiced in the squadron included carrier landing qualifications, gunnery, bombing and night flying.