Variants

* A-7A - First production version. Early USN Corsair IIs had two 20 mm Colt Mk 12 cannons with 250 rounds per gun. Maximum ordnance, carried primarily on the wing pylons, was theoretically 15,000 lb (6,804 kg), but was limited by maximum takeoff weight, so the full weapon load could only be carried with greatly reduced internal fuel. 199 built.
* A-7B - Uprated TF30-P-8 engine with 12,190 lbf (54.2 kN) of thrust. In 1971, surviving A-7B were further upgraded to TF30-P-408 with 13,390 lbf (59.6 kN) of thrust. 196 built.
* A-7C - first 67 production A-7E with TF30 engines.
* TA-7C - two-seat trainer version for US Navy, 24 converted from A-7B, 36 from A-7C. Upgraded to A-7E standard in 1984.
* A-7D - In the footsteps of recently adopting another Navy design, the F-4 Phantom II, USAF requested a version of A-7 for Tactical Air Command to fulfill the need for an inexpensive close-air support replacement for A-1 Skyraider. On 5 November 1965 the USAF announced that it would purchase a version of the A-7, designated the A-7D. The most important difference from Navy versions was adoption of the Allison TF41-A-1 turbofan, a license-built version of British Rolls-Royce Spey. With 14,500 lbf (64.5 kN) of thrust, the engine offered a considerable boost in performance. In addition, avionics were upgraded, internal armament was changed to a single 20 mm M61 Vulcan gatling cannon, and the in-flight refueling method was changed from probe-and-drogue to the boom. The YA-7D prototype with TF30 flew on 6 April 1968, with the first TF41 aircraft taking to the air on 26 September 1968. The aircraft were later updated to carry the Pave Penny laser spot tracker to add the capability to drop guided bombs. 459 built.
* A-7E - the Navy was so impressed with the performance gain of USAF A-7D that they ordered their own version with the TF41 engine. The first prototype flew on 25 November 1968. In 1986, 231 A-7E were equipped to carry the LANA (Low-Altitude Night Attack) pod which projected amplified light image on the HUD and, in conjunction with radar, provided terrain following down to 460 mph (740 km/h) at 200 ft (60 m). 529 built (not counting 67 A-7C).
* YA-7F (A-7D Plus, A-7 Strikefighter) - In 1985, USAF requested proposals for a fast strike aircraft because of concerns that A-10 Thunderbolt II was too slow for interdiction. The design called for a new engine, either the Pratt & Whitney F100 or General Electric F110. LTV responded with a supersonic version of A-7 powered by a F100-PW-220 with 26,000 lbf (115.7 kN) of thrust. To accommodate the new engine, the fuselage was lengthened about 4 ft (1.22 m). New fuselage sections were inserted in both the forward and aft fuselage - a 30 in (76 cm) section in front of the wing and an 18 in (46 cm) section behind the wing. The wing was strengthened and fitted with new augmented flaps, leading edge extensions and automatic maneuvering flaps. The vertical stabilizer height was increased about 10 in (25 cm). Ironically, the end result resembled the F-8 Crusader from which the A-7 was originally derived. Two A-7D were modified, the first one flying on 29 November 1989 and breaking the sound barrier on its second flight. The second prototype flew on 3 April 1990. The project was cancelled in favor of the F-16 Fighting Falcon.
* A-7G - proposed version for Switzerland, none built
* A-7H - Modified A-7E for Greece without air-refuelling capability, 60 built.
* TA-7H - two-seat trainer version for Greece
* EA-7L - 8 TA-7C modified into electronic aggressor aircraft used by VAQ-34, upgraded to A-7E standard in 1984
* TA-7K - two-seat trainer version for Air National Guard, 30 built
* A-7P - rebuilt ex-Navy A-7A for Portugal
* TA-7P - two-seat trainer version for Portugal
* YA-7E or YA-7H - two-seat prototypes built by Ling-Temco-Vought as a private venture.