Big River is a census-designated place (CDP) in San Bernardino County, California, United States. The population was 1,327 at the 2010 census, up from 1,266 at the 2000 census.GeographyBig River is located on the west bank of the Colorado River at .According to the United States Census Bureau, the CDP has a total area of 11.4sqmi. 10.8sqmi of it is land and 0.5sqmi of it is water.Demographics2010The 2010 United States Census reported that Big River had a population of 1,327. The population density was 116.9 people per square mile (45.1/km²). The racial makeup of Big River was 1,137 (85.7%) White (79.5% Non-Hispanic White), 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. Hispanic or Latino of any race were 160 persons (12.1%).The Census reported that 1,327 people (100% of the population) lived in households, 0 (0%) lived in non-institutionalized group quarters, and 0 (0%) were institutionalized.