Mundoolun is a semi-rural locality within Logan City, Queensland, Australia. The locality was one of the first pastoral runs in the Logan/Albert River catchment. Previously part of Beaudesert Shire, Mundoolun merged with Logan City in 2008.
The name Mundoolun is generally attributed to mundoolgunn (various spellings, including mundulgunn), a place name for death adder in the Bundjalung language (Yugambeh dialect). In 1936 a toponymic list appeared in The Courier-Mail newspaper referring to an indigenous word Mundoolunookum of the same meaning.
The suburb is located in the Albert River valley, bounded by the Albert River to the east and the Birnam Range to the west. Mundoolun Bridge marks the boundary between the Upper and Lower Albert River reaches.