2015 Pac-12 football standings
	Conf				Overall
Team		W		L		W		L
North Division
#3 Stanford x$		8	–	1		12	–	2
#19 Oregon		7	–	2		9	–	4
Washington State		6	–	3		9	–	4
California		4	–	5		8	–	5
Washington		4	–	5		7	–	6
Oregon State		0	–	9		2	–	10
South Division
USC xy		6	–	3		8	–	6
#17 Utah x		6	–	3		10	–	3
UCLA		5	–	4		8	–	5
Arizona State		4	–	5		6	–	7
Arizona		3	–	6		7	–	6
Colorado		1	–	8		4	–	9
Championship: Stanford 41, USC 22
$ – Conference champion x – Division champion/co-champions y – Championship game participant As of January 12, 2016; Rankings from AP Poll

The 2015 Washington State Cougars football team represented Washington State University during the 2015 NCAA Division I FBS football season. The team was coached by fourth-year head coach Mike Leach and played their home games at Martin Stadium in Pullman, Washington. They were members of the North Division of the Pac-12 Conference. They finished the season 9–4, 6–3 in Pac-12 play to finish in third place in the North Division. They were invited to the Sun Bowl where they defeated the Miami Hurricanes.