The Thornes Bridge was a timber Allan truss-type bridge that spanned the Mulwaree River between Goulburn and Brisbane Grove in New South Wales, Australia.

It was a rare example of a bridge of this type built after World War I.

It was built in 1920 by J.J. McPhillips, and was designed by Percy Allan.

The main span of the bridge was 27.4 m (89.9 ft) long.

[1] Due to its significance to the region, the original bridge had been listed on the NSW State Heritage Register.