Gary Ryan, 43, was found with critical stab wounds at a Mundubbera property on August 23 and rushed to hospital but was unable to be saved.

On Wednesday, police charged a woman, 19, from Orange, New South Wales with Mr Ryan's murder.

She was arrested in Nanango, north of Toowoomba, and is expected to appear in Kingaroy Magistrates Court on Wednesday.

The young woman is the fifth person to be charged over Mr Ryan's death.

A woman 39, from Orange, New South Wales, Mark Stephen Crump, 35, also from Orange, New South Wales, Dubbo man Trevor Spencer, 70, and 63-year-old Queensland man Stephen Peter Crump have all been charged with the murder of Mr Ryan.