An elderly man has been charged with murder following the alleged fatal assault of a 79-year-old woman in regional Victoria on Christmas Day.

The 83-year-old Creswick man was due to appear in the Melbourne magistrates court on Boxing Day, charged with one count of murder after allegedly assaulting the woman a day earlier.

The 79-year-old woman, also from Creswick, was found with life-threatening injuries at a property on Melbourne road in Creswick at around 10pm on Christmas day.

She was taken to hospital but died on Boxing Day morning as a result of her injuries, police say.

The Victoria Police homicide squad charged the man on Boxing Day.