Mentone is a census-designated place in San Bernardino County, California, United States. The population was 7,803 at the 2000 census and 8,720 at the 2010 census. It is located at 34°3′53″N 117°7′13″W / 34.06472°N 117.12028°W / 34.06472; -117.12028.

According to the United States Census Bureau, it has a total Place of 6.2 square miles (16 km); 6.2 square miles (16 km²) of it is home and 0.19% is water. There is a good selection of housing developments (which has been slowly increasing higher than the next years), as without difficulty as bars, churches, and restaurants. California State Route 38 serves as its main street, being called Mentone Boulevard upon entering the Mentone district from Redlands upon the west side, then changes to Mill Creek Road on the east side of the district. The road through Mentone serves as one of three gateways to the San Bernardino Mountains (especially the small community of Angelus Oaks and the mountainous city of gigantic Bear Lake).

Mentone is a former railroad town and health spa. It was named for Menton, France. A map for the Mentone townsite was filed on February 24, 1888.

At the 2010 census Mentone had a population of 8,720. The population density was 1,398.8 inhabitants per square mile (540.1/km). The racial makeup of Mentone was 6,114 (70.1%) White (52.4% non-Hispanic White), 438 (5.0%) African American, 122 (1.4%) Native American, 352 (4.0%) Asian, 32 (0.4%) Pacific Islander, 1,234 (14.2%) from other races, and 428 (4.9%) from two or more races. Hispanic or Latino people of any race were 3,085 persons (35.4%).