Dallas City is a city in Hancock and Henderson counties in the U.S. state of Illinois. The population was 945 at the 2010 census, a decline from 1,055 in 2000.
Dallas City is located at 40°38′12″N 91°9′55″W / 40.63667°N 91.16528°W / 40.63667; -91.16528 (40.636565, -91.165256).
According to the 2010 census, Dallas City has a total area of 3.272 square miles (8.47 km), of which 2.37 square miles (6.14 km) (or 72.43%) is land and 0.902 square miles (2.34 km) (or 27.57%) is water.
As of the census of 2000, there were 1,055 people, 466 households, and 301 families residing in the city. The population density was 444.2 people per square mile (171.2/km²). There were 503 housing units at an average density of 211.8 per square mile (81.6/km²). The racial makeup of the city was 99.72% White, 0.09% Native American, and 0.19% from two or more races. Hispanic or Latino of any race were 0.57% of the population.
There were 466 households out of which 23.2% had children under the age of 18 living with them, 55.4% were married couples living together, 7.9% had a female householder with no husband present, and 35.2% were non-families. 30.7% of all households were made up of individuals and 15.7% had someone living alone who was 65 years of age or older. The average household size was 2.25 and the average family size was 2.79.
In the city, the population was spread out with 20.6% under the age of 18, 6.4% from 18 to 24, 22.7% from 25 to 44, 28.9% from 45 to 64, and 21.4% who were 65 years of age or older. The median age was 45 years. For every 100 females, there were 85.1 males. For every 100 females age 18 and over, there were 83.0 males.
The median income for a household in the city was $31,731, and the median income for a family was $41,316. Males had a median income of $37,279 versus $18,571 for females. The per capita income for the city was $16,188. About 9.5% of families and 13.4% of the population were below the poverty line, including 18.6% of those under age 18 and 10.1% of those age 65 or over.