The club have announced the former Portsmouth striker is to leave Westleigh Park after seven years at the helm.
Bradbury took the club to back-to-back titles after a great few years.
But the Hawks’ first season in the National League didn’t live up to expectations and they were relegated nearly a month before the end.
Bradbury leaves the club after Easter Monday’s defeat at Aldershot Town.
Havant’s Monday night statement read: “The Hawks and Lee Bradbury can this evening confirm that they have parted company by mutual consent.
“Lee has been here for seven years, he is held in the highest esteem by both the board and the majority of fans and he and his family is more than welcome to Westleigh Park.
“The club would like to thank Lee for his hard work and efforts over the past few years and wish him well for the future.”