The name Meager Mountain was adopted on May 6, 1924 as labelled on a 1923 British Columbia map. In 1966 the volcano was renamed Mount Meager. According to a BC Geographical Names letter written in March 1983, the local name, Cathedral, was duplicated elsewhere, so the mountain was renamed Meager after the creek of that name which lies to the south of it. Meager Creek is named after J. B. Meager who owned timber licences on the creek. Despite its official name, Mount Meager is sometimes mistakenly spelled Mount Meagre or Mount Meagher.