IROC IV was the fourth year of IROC competition, which took place over three weekends in 1976 and 1977. It saw the use of the Chevrolet Camaro in all races, and the schedule was held over in its entirety from IROC III. A. J. Foyt won the championship and $50,000 without winning a race for the second year in a row.

The roster of drivers and final points standings were as follows:^[1]

Rank	Driver	Winnings	Series
1	A. J. Foyt	$50,000	USAC Champ Car
2	Cale Yarborough	$25,000	NASCAR Winston Cup
3	Bobby Unser	$23,000	USAC Champ Car
4	Johnny Rutherford	$20,000	USAC Champ Car
5	Buddy Baker	$18,000	NASCAR Winston Cup
6	Richard Petty	$15,000	NASCAR Winston Cup
7	Al Holbert	$13,000	IMSA Camel GT
8	Al Unser	$10,500	USAC Champ Car
9	David PearsonAll	$10,500	NASCAR Winston Cup
10	Jody Scheckter3	$5,000	Formula One
11	Gordon Johncock	$5,000	USAC Champ Car
12	James Hunt1	$5,000	Formula One