🇺🇸 Montclair is a city in the Pomona Valley, in south-western San Bernardino County, California.
Montclair has a population of over 36,664 people. Montclair also forms part of the wider San Bernardino County which has a population of over 2,035,210 people. It is also a part of the larger Riverside-San Bernardino-Ontario area. Montclair is situated near Pomona.