Coonamia is a locality to the east of Port Pirie in the Mid North region of South Australia. The Coonamia railway station is the Port Pirie station used by trains between Adelaide or Sydney and Perth or Darwin. Coonamia is crossed from west to east by both the Port Pirie-Cockburn railway line and Warnertown Road which connects Port Pirie to the Augusta Highway and thence to Adelaide. It is on the plains between Port Pirie and the Southern Flinders Ranges.
Coonamia is named for the railway station, which is reputed to have been named in 1929 for the Aboriginal word for cold.