The Town of Antonito is a Statutory Town located in Conejos County, Colorado, United States. The town population was 781 at the 2010 United States Census.
Antonito is located in the San Luis Valley near the southern border of Colorado at 37°5′N 106°1′W / 37.083°N 106.017°W / 37.083; -106.017 (37.077, -106.010), along U.S. Highway 285. It is 28 miles (45 km) north to Alamosa and 30 miles (48 km) south to U.S. Route 64 at Tres Piedras, New Mexico.
According to the United States Census Bureau, Antonito has a total area of 0.4 square miles (1.0 km), all of it land.
Antonito is the southern terminus of the San Luis and Rio Grande Railroad and the eastern terminus of the steam powered, narrow gauge Cumbres & Toltec Scenic Railroad, which runs westwards to Osier, Colorado, and Chama, New Mexico.
At the 2000 census, there were 873 people, 357 households and 234 families residing in the town. The population density was 2,212.3 per square mile (864.3/km²). There were 396 housing units at an average density of 1,003.5 per square mile (392.0/km²). The racial makeup of the town was 61.40% White, 0.11% African American, 3.55% Native American, 0.23% Asian, 31.96% from other races, and 2.75% from two or more races. Hispanic or Latino of any race were 90.26% of the population.
There were 357 households of which 33.9% had children under the age of 18 living with them, 37.8% were married couples living together, 20.4% had a female householder with no husband present, and 34.2% were non-families. 31.9% of all households were made up of individuals and 16.5% had someone living alone who was 65 years of age or older. The average household size was 2.45 and the average family size was 3.09.
28.8% of the population were under the age of 18, 8.4% from 18 to 24, 23.1% from 25 to 44, 21.4% from 45 to 64, and 18.3% who were 65 years of age or older. The median age was 36 years. For every 100 females, there were 98.9 males. For every 100 females age 18 and over, there were 91.4 males.
The median household income was $19,205 and the median family income was $23,162. Males had a median income of $25,417 compared with $17,500 for females. The per capita income for the town was $10,047. About 26.4% of families and 29.6% of the population were below the poverty line, including 36.3% of those under age 18 and 22.5% of those age 65 or over.