Orphaned at an early age he was sent to a children's home with his brother Bernard. Running away to join a travelling circus, the pair worked as roustabouts. While a member of the circus, Hawkeye was trained by the original Swordsman and Trickshot.
Hawkeye has been an active member of the
Avengers for years, with his archery skills augmenting the superhuman powers of his associates. For a short time, Barton abandoned his Hawkeye identity, and taking Henry Pym's growth serum, operated under the name
Goliath. He resumed his Hawkeye identity soon after. He has frequently taken extended leaves of absence from the
Avengers, trying to establish a career for himself outside of the group. He was once security chief for Cross Technological Enterprises.
Hawkeye met and eloped with fellow crimefighter Mockingbird during one of his leaves of absence from the
Avengers. Upon his return, he was appointed the chairman of a second team of
Avengers based on the West Coast by then chairman, the
Vision. Hawkeye and Mockingbird lived in the new
Avengers Compound outside Los Angeles and were the guiding force behind the new team.
After Mockingbird's death, Hawkeye became a solo agent for a considerable amount of time. After years fighting alongside the
Avengers, Hawkeye offered to lead the
Thunderbolts. Sympathetic to their plight as criminals trying to redeem their past actions, he decided to help them become a legitimate superhero team. He was also romantically involved with Moonstone (Karla Sofen). Eventually rejoining the
Avengers, Clint was thought to have perished on an exploding Kree ship created by a crazed
Scarlet Witch.
Recently, Hawkeye suddenly reappeared out of Cloak's shroud after Wanda Maximoff recreated the 616 universe by altering reality.