Groomsville is a rural locality in the Toowoomba Region on the Darling Downs, Queensland, Australia. In the 2021 census, Groomsville had a population of 132 people.

The Cooby Dam is a rock–fill embankment dam with an un–gated spillway across the Cooby Creek, a tributary of Condamine River, at Groomsville in the Toowoomba Region on the Darling Downs, Queensland, Australia. The main purpose of the dam is for potable water supply of the Toowoomba region. The impounded reservoir is called the Cooby Creek Reservoir.