The former Western Bulldogs star is accused of violently attacking the election worker during a heated dispute at a voting centre in Essendon about 6pm on November 25.
Police are investigating the alleged incident which reportedly occurred after Mr Liberatore was refused access to the voting centre because it was closed.
"A 56-year-old Moonee Ponds man was charged with unlawful assault," a Victoria Police spokeswoman said.
The electoral commission confirmed an incident had occurred but would not comment on specifics.
"The VEC has a zero-tolerance approach to intimidation, harassment, violence and threatening behaviour at voting centres," a spokeswoman said.
"It is the VEC's responsibility to ensure a safe workplace for its election staff and a safe voting experience for voters, and we will respond accordingly when the behaviour of voters or other electoral participants does not meet expectations."
A lawyer for Mr Liberatore, the father of current Bulldogs player Tom Liberatore, said he would contest the charges.
He is set to appear in Broadmeadows Magistrates Court on June 2.
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