McNichols Sports Arena, Indoor sports arena in Denver, United States.

McNichols Sports Arena was a multi-purpose indoor arena in Denver, Colorado, completed in 1975 at a cost of $16 million. It seated 16,061 for hockey and 17,171 for basketball, and its facade of light grey concrete panels bore the name in raised lettering above a band reading "GOOD LUCK ROCKIES" and a glass entryway.

McNichols Sports Arena opened on August 22, 1975, with a Lawrence Welk concert, built next to Mile High Stadium at a cost of $16 million. It was named after Denver mayor William H. McNichols Jr., in office from 1968 to 1983, and the naming drew a small scandal because he still held the post. A 1986 renovation added 27 luxury suites and replaced the Stewart-Warner end-zone scoreboards with White Way Sign video screens. The arena closed in 1999 and was demolished in 2000 for parking around Empower Field at Mile High.

The venue hosted over 400 rock concerts during its lifetime, including performances by Elvis Presley, ZZ Top, and the Grateful Dead's 13 appearances.

The arena stood beside Mile High Stadium, and after its 2000 demolition the site became a parking lot for Empower Field at Mile High. Its concourse corridors were narrow and dark, and the locker rooms and showers fell short of NBA and NHL standards. Only 27 luxury suites existed, with no club seating.

On December 13, 1983, the Nuggets lost 186-184 to Detroit in triple overtime, still the highest-scoring game in NBA history. Kiki Vandeweghe scored 51 and Alex English 47 for Denver, while Isiah Thomas had 47 and John Long 41 for the Pistons. Only about 9,300 spectators saw it, and the game was not televised in Denver.