The Queensland Railways A10 Avonside class locomotive was a class of 2-4-0 steam locomotives operated by the Queensland Railways.

In 1864, the Avonside Engine Company, Bristol built four locomotives for the Queensland Railway.

After being built they were dismantled and reassembled at North Ipswich Railway Workshops.

Originally classified the A class, per Queensland Railway's classification system they were designated the A10 Avonside class in 1890, A representing they had two driving axles, and 10 the cylinder diameter in inches.

[1] One, 3 Lady Bowen, operated the first Queensland Railways service in 1865 between Grandchester and Ipswich.