Willis, who has made 42 appearances for the Pilgrims so far this season, took the Turnbull Building and Plumbing Supplies-sponsored award. Ashley Jackson and Jay Rollins finished second and third respectively.
Willis also secured a BUSA double, winning both the votes of the adult and junior members.
Ben Davies scooped the Barbara Singleton Memorial Trophy for players' player of the year.
ROLL OF HONOUR 2018-2019
Turnbull Building and Plumbing Supplies Player of the Year: George Willis
Barbara Singleton Memorial Trophy (for Players' Player of the Year): Ben Davies
BUSA Player of the Year: George Willis
BUSA Juniors Favourite Player of the Year: George Willis
BUSA Special Recognition Award: Ken Fox (Club Historian)
U19s Player of the Year: Nathan Stevens
Ladies Player of the Year: Gabrielle Smith
Dick Carrington Memorial Trophy (Club Team of the Year): Boston United Ladies