Hamilton is located in central Hamilton County at . U.S. Route 281 passes through the center of the city, leading north to Hico and south to Evant. Texas State Highway 36 crosses US 281 in the center of town and leads southeast to Gatesville and northwest to Comanche. Texas State Highway 22 leads northeast from Hamilton to Meridian. According to the United States Census Bureau, the city has a total area of, of which are land and, or 2.11%, are water. The city is drained by Pecan Creek, an east-flowing tributary of the Leon River.
Demographics
As of the census of 2010, there were 3,095 people, 1,230 households, and 777 families residing in the city. The population density was 1,067.2 people per square mile. There were 1,470 housing units at an average density of 506.9 per sq mi. The racial makeup of the city was 94.5% White, 0.7% African American, 0.7% Native American, 0.5% Asian, 2.8% from other races, and 0.8% from two or more races. Hispanic or Latino of any race were 8.9% of the population. There were 1,230 households, out of which 26.9% had children under the age of 18 living with them, 45.7% were married couples living together, 13.3% had a female householder with no husband present, 4.1% had a male householder with no wife present, and 36.8% were non-families. 32.1% of all households were made up of individuals, and 17.6% had someone living alone who was 65 years of age or older. The average household size was 2.38 and the average family size was 2.92. In the city, the population was spread out, with 21.8% under the age of 18, 27.9% from 18 to 44, 23.9% from 45 to 64, and 26.4% who were 65 years of age or older. The median age was 45.2 years. For every 100 females, there were 86.4 males. For every 100 females age 18 and over, there were 82.2 males. The median income for a household in the city was $26,585, and the median income for a family was $38,702. Males had a median income of $27,074 versus $17,500 for females. The per capita income for the city was $15,012. About 12.2% of families and 15.9% of the population were below the poverty line, including 23.0% of those under age 18 and 16.1% of those age 65 or over.
U.S. Route 281 is the largest highway and main north–south route through Hamilton. US 281 runs all the way from the Mexico–US border in the south to the Canada–US border in the north.
Texas State Highway 36 runs through Hamilton on a generally east–west axis on its way between Abilene to the northwest and Freeport to the southeast.
Texas State Highway 22 reaches its western terminus within the city limits of Hamilton at its junction with State Highway 36 near the eastern edge of the city. State Highway 22 runs east from Hamilton to Corsicana.