Bang collapsed on August 1 while she was in Thailand preparing for a tournament.
She was rushed to a hospital in Bangkok where she underwent emergency brain surgery but, after being two weeks in intensive care, she died on Thursday.
"The Australian golf community is deeply saddened by the passing of young tour member Jessica Bang in Thailand," the WPGA Tour of Australasia said in a statement.
"Jessica was an outstanding young talent who made a significant impression in her short time on the tour."
Bang earned her place on the tour through qualifying school at the end of last year and won the Women's New South Wales Open Regional Qualifying Event in February in just her fifth professional start.
