The Town of Basalt is a statutory town in Eagle and Pitkin counties in the U.S. state of Colorado. The town population was 3,857 at the 2010 United States Census.
Basalt is located at 39°22′6″N 107°2′18″W / 39.36833°N 107.03833°W / 39.36833; -107.03833 (39.368382, -107.038263), along State Highway 82, and at the confluence of the Fryingpan and Roaring Fork rivers. According to the United States Census Bureau, the town has a total area of 1.9 square miles (4.9 km), of which 1.9 square miles (4.9 km) is land and 0.04 square miles (0.10 km) (1.03%) is water.
As of the census of 2000, there were 2,681 people, 1,052 households, and 637 families residing in the town. The population density was 1,394.8 people per square mile (539.1/km²). There were 1,218 housing units at an average density of 633.7 per square mile (244.9/km²). The racial makeup of the town was 91.53% White, 0.48% African American, 0.52% Native American, 1.27% Asian, 0.11% Pacific Islander, 4.77% from other races, and 1.31% from two or more races. Hispanic or Latino of any race were 11.75% of the population.
There were 1,052 households out of which 34.0% had children under the age of 18 living with them, 50.1% were married couples living together, 7.4% had a female householder with no husband present, and 39.4% were non-families. 24.0% of all households were made up of individuals and 2.0% had someone living alone who was 65 years of age or older. The average household size was 2.55 and the average family size was 3.00.
In the town, the population was spread out with 23.6% under the age of 18, 6.8% from 18 to 24, 42.3% from 25 to 44, 24.4% from 45 to 64, and 3.0% who were 65 years of age or older. The median age was 34 years. For every 100 females, there were 108.8 males. For every 100 females age 18 and over, there were 110.6 males.
The median income for a household in the town was $67,200, and the median income for a family was $73,375. Males had a median income of $40,791 versus $30,532 for females. The per capita income for the town was $30,746. About 4.9% of families and 6.3% of the population were below the poverty line, including 5.9% of those under age 18 and 6.8% of those age 65 or over.