Monterey Park is a city in the western San Gabriel Valley region of Los Angeles County, California, United States, approximately seven mileā¦Monterey Park is a city in the western San Gabriel Valley region of Los Angeles County, California, United States, approximately seven miles east of the Downtown Los Angeles civic center. It is bordered by Alhambra, East Los Angeles, Montebello and Rosemead. The city's motto is "Pride in the past, Faith in the future".