The population was 36,590 at the 2010 census, down from 36,929 in 2000.
Monrovia has been used for filming TV shows, movies and commercials.
Incorporated in 1887, Monrovia has grown from a sparse community of orange ranches to a residential community of 37,000.
In 2016, Metro opened a new at grade light rail station in Monrovia called Monrovia Station. It is located at the intersection of Myrtle Avenue and Duarte Road, and is served by the Metro Gold Line. It is at the same location of the former Santa Fe Depot, which still stands.