Brinkworth (postcode 5464) is a town in the Mid North region of South Australia with a current population of 243. It is north west of the regional centre of Clare.
The Brinkworth area was first settled in the 1860s and the town laid out in 1892. Brinkworth is named after the early landowner, George Brinkworth.
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 . These lines were converted to broad gauge 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.
Brinkworth is in the local government area of Wakefield Regional Council, the state electoral district of Frome and the federal division of Grey.