Mentone is a census-designated place in San Bernardino County, California, United States. The population was 7,803 at the 2000 census. It is located at 34°3′53″N 117°7′13″W﻿ / ﻿34.06472°N 117.12028°W﻿ / 34.06472; -117.12028 (34.064663, -117.120242). According to the United States Census Bureau, it has a total area of 16.2 km² (6.2 mi²), 16.1 km² (6.2 mi²) of it is land and 0.16% is water. State Route 38 serves as its main street, called Mentone Boulevard as one enters Mentone from Redlands, then Mill Creek Road as one leaves the district and heads north toward Angelus Oaks and Big Bear.