Brinkworth (postcode 5464) is a town in the Mid North region of South Australia with a current population of 243. It is 31 km (19 mi) north west of the regional centre of Clare.

Brinkworth was a junction on the Gladstone railway line from Hamley Bridge to Gladstone in the north. The other line from Brinkworth went through Snowtown to Kadina and Wallaroo. Both were originally built as narrow gauge 1,067 mm (3 ft 6 in). These lines were converted to broad gauge 1,600 mm (5 ft 3 in) in 1927. The Hamley Bridge-Gladstone railway line closed in May 1988. The remaining Kadina-Brinkworth railway line closed in March 1993. The railway lines and yards have since been demolished.