St. Peters is a city in St. Charles County, Missouri, United States. The 2010 census showed the city’s population to be 52,575, tied for 10th place in Missouri with Blue Springs.
St. Peters is located at 38°46′44″N 90°36′11″W / 38.77889°N 90.60306°W / 38.77889; -90.60306 (38.778893, -90.603131). According to the United States Census Bureau, the city has a total area of 22.37 square miles (57.94 km), all land.
As of the census of 2010, there were 52,575 people, 20,861 households, and 14,244 families residing in the city. The population density was 2,350.2 inhabitants per square mile (907.4/km). There were 21,717 housing units at an average density of 970.8 per square mile (374.8/km). The racial makeup of the city was 91.7% White, 3.7% African American, 0.2% Native American, 1.8% Asian, 0.1% Pacific Islander, 0.8% from other races, and 1.8% from two or more races. Hispanic or Latino of any race were 2.5% of the population.
There were 20,861 households of which 33.0% had children under the age of 18 living with them, 53.8% were married couples living together, 10.0% had a female householder with no husband present, 4.5% had a male householder with no wife present, and 31.7% were non-families. 26.3% of all households were made up of individuals and 9.5% had someone living alone who was 65 years of age or older. The average household size was 2.51 and the average family size was 3.05.
The median age in the city was 38.8 years. 23.2% of residents were under the age of 18; 8.3% were between the ages of 18 and 24; 26.9% were from 25 to 44; 30% were from 45 to 64; and 11.4% were 65 years of age or older. The gender makeup of the city was 48.2% male and 51.8% female.
As of the census of 2000, there were 51,381 people, 18,435 households, and 13,936 families residing in the city. The population density was 2,425.5 people per square mile (936.7/km²). There were 18,776 housing units at an average density of 886.3 per square mile (342.3/km²). The racial makeup of the city was 94.25% White, 2.80% African American, 0.20% Native American, 1.23% Asian, 0.01% Pacific Islander, 0.44% from other races, and 1.07% from two or more races. Hispanic or Latino of any race were 1.49% of the population.
There were 18,435 households out of which 42.3% had children under the age of 18 living with them, 62.8% were married couples living together, 9.7% had a female householder with no husband present, and 24.4% were non-families. 20.3% of all households were made up of individuals and 6.4% had someone living alone who was 65 years of age or older. The average household size was 2.78 and the average family size was 3.24.
In the city the population was spread out with 30.0% under the age of 18, 7.4% from 18 to 24, 33.5% from 25 to 44, 21.3% from 45 to 64, and 7.8% who were 65 years of age or older. The median age was 34 years. For every 100 females, there were 95.0 males. For every 100 females age 18 and over, there were 90.6 males.
The median income for a household in the city was $57,898, and the median income for a family was $65,123. Males had a median income of $45,497 versus $30,295 for females. The per capita income for the city was $22,792. About 1.5% of families and 2.7% of the population were below the poverty line, including 2.6% of those under age 18 and 5.1% of those age 65 or over.