McCauley Weir is a weir located near Nanango, Queensland, Australia. It was originally constructed as a water supply for Nanango. It has since ceased to be used as a water supply and is only used by nearby farms for stock use.
When open, the weir is a popular spot with canoeists, fishers, bushwalkers and deer hunters (Hunting only on Private Property, hunting needs property owners permission). Small motorised craft is permitted, though no high horsepower petrol motors are allowed. Due to recent flood damage the road to the weir has lost it's bridge, South Burnett Council is currently reviewing the situation.