Clearlake Riviera is a census-designated place in Lake County, California. It lies at an elevation of 1755 feet . The population was 3,090 at the 2010 census.GeographyAccording to the United States Census Bureau, the CDP has a total area of 5.2 square miles (13.5 km²), over 99% of it land.DemographicsThe 2010 United States Census reported that Clearlake Riviera had a population of 3,090. The population density was 591.4 people per square mile (228.3/km²). The racial makeup of Clearlake Riviera was 2,641 (85.5%) White, 36 (1.2%) African American, 75 (2.4%) Native American, 40 (1.3%) Asian, 5 (0.2%) Pacific Islander, 167 (5.4%) from other races, and 126 (4.1%) from two or more races. Hispanic or Latino of any race were 424 persons (13.7%).The Census reported that 3,090 people (100% of the population) lived in households, 0 (0%) lived in non-institutionalized group quarters, and 0 (0%) were institutionalized.There were 1,224 households, out of which 398 (32.5%) had children under the age of 18 living in them, 618 (50.5%) were opposite-sex married couples living together, 145 (11.8%) had a female householder with no husband present, 56 (4.6%) had a male householder with no wife present. There were 132 (10.8%) unmarried opposite-sex partnerships, and 7 (0.6%) same-sex married couples or partnerships. 287 households (23.4%) were made up of individuals and 93 (7.6%) had someone living alone who was 65 years of age or older. The average household size was 2.52. There were 819 families (66.9% of all households); the average family size was 2.98.