Huntsville is located primarily in Madison County in the central part of the far northern region of the state of Alabama. Huntsville is the county seat of Madison County. The city extends west into neighboring Limestone County. Huntsville’s population was 180,105 as of the 2010 Census. The Huntsville Metropolitan Area’s population was 417,593. Huntsville is the fourth-largest city in Alabama and the largest city in the four-county Huntsville-Decatur Combined Statistical Area, which in 2008 had a total population of 545,770.
There were 66,742 households out of which 27.6% had children living with them, 45.5% were married couples living together, 13.7% had a female householder with no husband present, and 37.5% were non-families. 32.3% of all households were made up of individuals and 9.2% had someone living alone who was 65 years of age or older. The average household size was 2.29 and the average family size was 2.91. Same-sex couple households comprised 0.5% of all households.