St. Mary's, Colorado

St. Mary's is a census-designated place (CDP) and Unincorporated community in Clear Creek County, Colorado, United States. The population was 251 at the 2000 census and 283 at the 2010 census.GeographySt. Mary's is located at (39.820181, -105.649349).According to the United States Census Bureau, the CDP has a total area of 3.1sqmi, of which, 3.1sqmi of it is land and 0.33% is water.DemographicsAs of the census of 2000, there were 251 people, 110 households, and 61 families residing in the CDP. The population density was 82.1 people per square mile (31.7/km²). There were 240 housing units at an average density of 78.5 per square mile (30.3/km²). The racial makeup of the CDP was 94.82% White, 0.80% African American, 0.40% Asian, 3.98% from other races. Hispanic or Latino of any race were 10.36% of the population.There were 110 households out of which 30.9% had children under the age of 18 living with them, 47.3% were married couples living together, 1.8% had a female householder with no husband present, and 44.5% were non-families. 31.8% of all households were made up of individuals and none had someone living alone who was 65 years of age or older. The average household size was 2.28 and the average family size was 3.02.