10,000 (2001-2023) 9,700 (1996-2001)

9,305 (1993-1996)SurfaceMulti-surface
200 ft × 89 ft (61 m × 27 m) (2023-present)
200 ft × 100 ft (61 m × 30 m) (1993-2023)Opened1993TenantsMinnesota Golden Gophers (NCAA)
Men's Hockey (1993–present)
Women's Hockey (1997–2002)
Minnesota Blue Ox (RHI) (1999)

3M Arena at Mariucci (/ˌmɜːriˈuːtʃi/ MERR-ee-OO-chee) is the home arena for the Minnesota Golden Gophers men's ice hockey team of the University of Minnesota. The arena is located on the Minneapolis campus and seats approximately 10,000 fans (9,600 in the main bowl plus club room and suite seating). The arena opened in 1993 and is named after John Mariucci, the longtime Gopher coach who is considered the "godfather of Minnesota hockey." Under the gate is a quote from Mariucci: "Through these gates walk the greatest fans in college hockey." The ice sheet was Olympic sized (200 by 100 feet or 61 by 30 metres) from 1993 to 2023, when construction began on reducing the rink floor size. The women's ice hockey team played at Mariucci from 1997 until 2002 when they moved to Ridder Arena, which is connected to Mariucci via a tunnel.

Mariucci Arena has been host to prominent regional, national, and international competitions, including the 2005 and 2009 West Regional of the NCAA Men's Ice Hockey Championship, the 2006 NCAA Women's Division I Ice Hockey Tournament, and the 2006 World Short Track speed skating event. 3M Arena also hosted the inaugural Women's Frozen Four on March 23 and March 25, 2001.

The Minnesota State High School League state hockey tournament holds its consolation bracket at Mariucci. On March 19, 2022, 10,774 fans watched the Gophers take on the Michigan Wolverines in the B1G Tournament Championship Game, the largest crowd to watch a game at Mariucci Arena.

From 1950 to 1993 the hockey team played in the hockey arena section of Williams Arena. That arena was renamed Mariucci Arena in 1985. People now generally refer to that as the "old" Mariucci Arena.

In 2007, Sports Illustrated on Campus named Mariucci Arena one of the top ten venues in college sports. The facility was the only ice hockey arena to make the list.

Before the 2012-13 hockey season, the University of Minnesota upgraded Mariucci Arena, which saw the replacement of the old scoreboard with a new state of the art Daktronics videoboard and the addition of a fascia display that rings the arena.

In May 2014, a proposal for an $8 million renovation to the arena was announced. The renovations would include reducing the ice sheet to approximately 200 by 92.5 feet (61.0 m × 28.2 m), increased seating capacity, improved sightlines and an upgraded weight room. The proposed renovation would be funded privately. The reduced-size playing surface would allow for playing style to be more similar to the NHL, which has a standard 200-by-85-foot-sized rink (61 m × 26 m).

On July 10, 2017, Maplewood-based 3M bought the naming rights of Mariucci Arena for US$11,200,000 for 14 years.

In September 2020, the arena was again renovated by Gopher Athletics. The renovation spanned 11,000 square feet and included a new training center, a new 'M' Club alumni room and a remodeled office suite.

Ice surface reduction and renovation finally began with removal of the concrete arena rink base shortly after the March 18, 2023, Big Ten championship game.