Santa Clara is a city in Washington County, Utah, United States and is a part of the St. George Metropolitan Area. The population was 6,003 at the 2010 census, up from 4,630 at the 2000 census.
According to the United States Census Bureau, the city has a total area of 4.9 square miles (12.7 km²), of which, 4.9 square miles (12.6 km²) of it is land and 0.04 square miles (0.1 km²) of it (0.41%) is water.
As of the census of 2000, there were 4,630 people, 1,225 households, and 1,134 families residing in the city. The population density was 948.1 people per square mile (366.3/km²). There were 1,294 housing units at an average density of 265.0 per square mile (102.4/km²). The racial makeup of the city was 97.32% White, 0.15% African American, 0.30% Native American, 0.28% Asian, 0.32% Pacific Islander, 0.48% from other races, and 1.14% from two or more races. Hispanic or Latino of any race were 2.03% of the population.
There were 1,225 households out of which 57.3% had children under the age of 18 living with them, 86.0% were married couples living together, 4.8% had a female householder with no husband present, and 7.4% were non-families. 6.4% of all households were made up of individuals and 3.6% had someone living alone who was 65 years of age or older. The average household size was 3.78 and the average family size was 3.96.
In the city, the population was spread out with 40.2% under the age of 18, 9.3% from 18 to 24, 23.7% from 25 to 44, 17.3% from 45 to 64, and 9.5% who were 65 years of age or older. The median age was 26 years. For every 100 females, there were 105.0 males. For every 100 females age 18 and over, there were 101.8 males.
The median income for a household in the city was $52,770, and the median income for a family was $55,000. Males had a median income of $41,350 versus $21,495 for females. The per capita income for the city was $15,957. About 2.7% of families and 3.5% of the population were below the poverty line, including 4.1% of those under age 18 and 2.8% of those age 65 or over.
Santa Clara Utah neighborhoods include: Heights West, Pioneer East, Santa Clara, The Heights, W Sunset Blvd