La Crescenta-Montrose is an unincorporated area in Los Angeles County, California, United States. The community is bordered by Glendale to the south and west, La Cañada Flintridge to the east, and Angeles National Forest to the north. According to the United States Census Bureau, the La Crescenta-Montrose Census-Designated Place measures about 3.4 square miles, and the population was 19,997 at the 2020 census, up from 19,653 in 2010 and 18,532 in 2000.