Bear River City is a city in Box Elder County, Utah, United States. The population was 853 at the 2010 census, an increase over the 2000 population of 750. The population was sufficient under Utah state law for Bear River to become a city near the end of 2000. Although current state law requires a minimum population of 1000 for cities, Bear River City remains a city.
According to the United States Census Bureau, the town has a total area of 1.6 square miles (4.1 km²), all of it land.
As of the census of 2000, there were 750 people, 226 households, and 195 families residing in the town. The population density was 477.5 people per square mile (184.4/km²). There were 233 housing units at an average density of 148.4 per square mile (57.3/km²). The racial makeup of the town was 96.27% White, 0.27% Native American, 2.27% from other races, and 1.20% from two or more races. Hispanic or Latino of any race were 3.87% of the population.
There were 226 households out of which 46.9% had children under the age of 18 living with them, 78.8% were married couples living together, 6.6% had a female householder with no husband present, and 13.3% were non-families. 12.4% of all households were made up of individuals and 7.1% had someone living alone who was 65 years of age or older. The average household size was 3.32 and the average family size was 3.64.
In the town the age distribution of the population shows 36.7% under the age of 18, 8.0% from 18 to 24, 25.6% from 25 to 44, 19.3% from 45 to 64, and 10.4% who were 65 years of age or older. The median age was 30 years. For every 100 females, there were 110.1 males. For every 100 females age 18 and over, there were 100.4 males.
The median income for a household in the town was $52,212, and the median income for a family was $55,833. Males had a median income of $40,417 versus $24,821 for females. The per capita income for the town was $17,296. None of the population or families were below the poverty line.