Big River is a census-designated place (CDP) in San Bernardino County, California, United States.

[2] According to the United States Census Bureau, the CDP has a total area of 11.4 square miles (30 km2).

The racial makeup of Big River was 1,137 (85.7%) White (79.5% Non-Hispanic White),[20] 14 (1.1%) African American, 50 (3.8%) Native American, 2 (0.2%) Asian, 0 (0.0%) Pacific Islander, 54 (4.1%) from other races, and 70 (5.3%) from two or more races.

1,009 people (76.0% of the population) lived in owner-occupied housing units and 318 people (24.0%) lived in rental housing units.

According to the 2010 United States Census, Big River had a median household income of $29,063, with 11.8% of the population living below the federal poverty line.

There were 1,053 housing units at an average density of 96.5 per square mile (37.3/km2).

In the California State Legislature, Big River is in the 18th Senate District, represented by Democrat Steve Padilla, and in the 36th Assembly District, represented by Republican Jeff Gonzalez.

[24] In the United States House of Representatives, Big River is in California's 25th congressional district, represented by Democrat Raul Ruiz.