Hardin is a city in and the county seat of Big Horn County, Montana, United States. The population was 3,505 at the 2010 census.
Hardin is located at 45°43′55″N 107°36′45″W / 45.73194°N 107.61250°W / 45.73194; -107.61250 (45.731824, -107.612542).
According to the United States Census Bureau, the city has a total area of 2.57 square miles (6.66 km), all of it land.
As of the census of 2010, there were 3,505 people, 1,301 households, and 850 families residing in the city. The population density was 1,363.8 inhabitants per square mile (526.6/km). There were 1,401 housing units at an average density of 545.1 per square mile (210.5/km). The racial makeup of the city was 49.8% White, 0.7% African American, 40.8% Native American, 1.2% Asian, 0.1% Pacific Islander, 2.2% from other races, and 5.1% from two or more races. Hispanic or Latino of any race were 7.1% of the population.
There were 1,301 households of which 37.2% had children under the age of 18 living with them, 43.4% were married couples living together, 15.4% had a female householder with no husband present, 6.5% had a male householder with no wife present, and 34.7% were non-families. 30.7% of all households were made up of individuals and 14.4% had someone living alone who was 65 years of age or older. The average household size was 2.64 and the average family size was 3.29.
The median age in the city was 33.2 years. 29.7% of residents were under the age of 18; 10.1% were between the ages of 18 and 24; 22.1% were from 25 to 44; 24.7% were from 45 to 64; and 13.3% were 65 years of age or older. The gender makeup of the city was 48.7% male and 51.3% female.
As of the census of 2000, there were 3,384 people, 1,295 households, and 868 families residing in the city. The population density was 2,415.5 people per square mile (933.3/km²). There were 1,411 housing units at an average density of 1,007.2 per square mile (389.1/km²). The racial makeup of the city was 62.26% White, 0.12% African American, 31.59% Native American, 0.35% Asian, 1.03% from other races, and 4.64% from two or more races. Hispanic or Latino of any race were 5.53% of the population.
There were 1,295 households out of which 36.2% had children under the age of 18 living with them, 46.3% were married couples living together, 16.6% had a female householder with no husband present, and 32.9% were non-families. 29.2% of all households were made up of individuals and 12.7% 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 3.16.
In the city, the population was spread out with 31.0% under the age of 18, 7.7% from 18 to 24, 26.3% from 25 to 44, 21.1% from 45 to 64, and 13.9% who were 65 years of age or older. The median age was 34 years. For every 100 females there were 88.8 males. For every 100 females age 18 and over, there were 79.6 males.
The median income for a household in the city was $28,018, and the median income for a family was $33,729. Males had a median income of $28,493 versus $19,444 for females. The per capita income for the city was $13,041. About 17.2% of families and 23.9% of the population were below the poverty line, including 33.1% of those under age 18 and 13.1% of those age 65 or over.