1983 12 Hours of Sebring

The 12 Hours of Sebring, The Coca-Cola Classic, was the third round of the 1983 IMSA GT Championship and was held at the Sebring International Raceway, on March 19, 1983. Victory overall went to the No. 9 Personalized Autohaus Porsche 934 driven by Wayne Baker, Jim Mullen, and Kees Nierop.

Race results
Class winners in bold.