2020 census As of the
2020 census, Huntsville had a population of 45,941, with a median age of 31.6 years. 13.2% of residents were under the age of 18 and 11.1% were 65 years of age or older. For every 100 females, there were 137.3 males, and for every 100 females age 18 and over there were 142.8 males age 18 and over. 93.9% of residents lived in urban areas, while 6.1% lived in rural areas. There were 14,564 households in Huntsville, of which 22.6% had children under the age of 18 living in them. Of all households, 29.3% were married-couple households, 27.6% were households with a male householder and no spouse or partner present, and 37.0% were households with a female householder and no spouse or partner present. About 36.7% of all households were made up of individuals and 9.5% had someone living alone who was 65 years of age or older. There were 16,705 housing units, of which 12.8% were vacant. The homeowner vacancy rate was 2.4% and the rental vacancy rate was 11.0%.
2010 census As of the 2010
census, 35,078 people, 10,266 households, and 7,471 families lived in the city. The population density was 1438.3/km sq (10,135.1/mi sq). The 11,508 housing units ha an average density of 1143.8/km sq (1372.4/mi sq). The
racial makeup of the city was 65.78% White, 26.14% African American, 0.33% Native American, 1.11% Asian, 0.07% Pacific Islander, 4.91% from other races, and 1.65% from two or more races. Hispanics or Latinos of any race were 16.22% of the population. Of the 10,266 households, 25.3% had children under 18 living with them, 37.0% were married couples living together, 12.5% had a female householder with no husband present, and 46.7% were not families. Abot 30.8% of all households were made up of individuals, and 7.5% had someone living alone who was 65 or older. The average household size was 2.31 and the average family size was 2.97. In the city, the age distribution was 15.1% under 18, 29.3% from 18 to 24, 30.8% from 25 to 44, 16.3% from 45 to 64, and 8.5% who were 65 or older. The median age was 28 years. For every 100 females, there were 152.9 males. For every 100 females age 18 and over, there were 163.8 males. The prison population is included in the city's population, which results in a significantly skewed sex ratio. The median income for a household in the city was $27,075, and for a family was $40,562. Males had a median income of $27,386 versus $22,908 for females. The per capita income for the city was $13,576. About 13.1% of families and 23.9% of the population were below the poverty line, including 23.9% of those under 18 and 14.7% of those 65 or over. ==Geography==