The 1983 CART PPG Indy Car World Series season was the 5th national championship season of American open wheel racing sanctioned by CART. The season consisted of 13 races. Al Unser was the national champion, and the rookie of the year was Teo Fabi. The 1983 Indianapolis 500 was sanctioned by USAC, but an arrangement was made such that it counted towards the CART points championship. Tom Sneva won the Indy 500, after three previous runner-up finishes.