2012–13 Pac-12 Conference men's basketball standings
	Conf				Overall
Team	W		L	PCT	W		L	PCT
#24 UCLA	13	–	5	.722	25	–	10	.714
#15 Oregon †	12	–	6	.667	28	–	9	.757
#21 Arizona	12	–	6	.667	27	–	8	.771
California	12	–	6	.667	21	–	12	.636
Colorado	10	–	8	.556	21	–	12	.636
Arizona State	9	–	9	.500	22	–	13	.629
Stanford	9	–	9	.500	19	–	15	.559
Washington	9	–	9	.500	18	–	16	.529
USC	9	–	9	.500	14	–	18	.438
Utah	5	–	13	.278	15	–	18	.455
Oregon State	4	–	14	.222	14	–	18	.438
Washington State	4	–	14	.222	13	–	19	.406


† 2013 Pac-12 Tournament winner As of March 23, 2013; Rankings from AP Poll

The 2012–13 Arizona Wildcats men's basketball team represented the University of Arizona during the 2012–13 NCAA Division I men's basketball season. They were led by fourth-year head coach Sean Miller and played home games at McKale Center in Tucson, Arizona as members of the Pac-12 Conference.

Seeded 6th in the West Region of the 2013 NCAA Tournament, the team defeated (11) Belmont and (14) Harvard by a combined score of 40 points before losing 73–70 to (2) Ohio State in the Sweet Sixteen.

After starting the season undefeated in non-conference play the team went 12–6 in conference and fell to UCLA in the Pac-12 Tournament semifinals. The team's mid-season record of 14–0 was the second best start in program history since the 1931–32 team opened the season 16–0.

Arizona entered the season ranked 11th in the Coaches and 12th in the AP preseason polls, climbed to 3rd in both after going undefeated into January, and then fell to 20th (Coaches) and 21st (AP) just prior to the start of the NCAA tournament.

Before the season began Sean Miller and his staff recruited the nation's 3rd-ranked class of 2012 and brought in three well-regarded transfers, among them starting point guard Mark Lyons, who led the team in scoring with 15.6 points-per-game, including 24.3 points-per-game in NCAA tournament play.

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