Riverside is a census-designated place in Box Elder County, Utah, United States. The population was 760 at the 2010 census.According to the United States Census Bureau, the CDP has a total area of 6.7 square miles, all of it land.As of the census of 2000, there were 678 people, 196 households, and 167 families residing in the CDP. The population density was 100.7 people per square mile. There were 203 housing units at an average density of 30.1/sq mi. The racial makeup of the CDP was 95.43% White, 0.15% Native American, 2.06% Asian, 0.15% Pacific Islander, 0.44% from other races, and 1.77% from two or more races. Hispanic or Latino of any race were 2.21% of the population.There were 196 households out of which 51.0% had children under the age of 18 living with them, 79.1% were married couples living together, 4.1% had a female householder with no husband present, and 14.3% were non-families. 11.7% of all households were made up of individuals and 8.