Carthage is a city in Hancock County, Illinois, United States. The population was 2,605 as of the 2010 census, down from 2,725 in 2000. It is the county seat of Hancock County. Carthage is best known for being the site of the 1844 murder of Joseph Smith, founder of the Latter Day Saint movement.
Carthage is located near the center of Hancock County at 40°24′52″N 91°8′0″W / 40.41444°N 91.13333°W / 40.41444; -91.13333 (40.414327, -91.133472). U.S. Route 136 runs through the center of town as Buchanan Street; it leads east 27 miles (43 km) to Macomb and west 14 miles (23 km) to Keokuk, Iowa, on the Mississippi River. Illinois Route 94 leads north from Carthage as Madison Street and east with US-136 to Illinois Route 110 just outside the city limits. Dallas City is 16 miles (26 km) north of Carthage via IL-94 and IL-9, while Quincy is 43 miles (69 km) south via IL-110.
According to the 2010 census, the city has an area of 2.44 square miles (6.3 km), all land.
In June 2006, development property on the east side of Carthage was voluntarily annexed into the city limits. This property totaled approximately .43 square miles (1.1 km), all land except for an 8 acres (32,000 m) lake.
As of the 2010 Census, there were 2,605 persons living in 1,151 households in Carthage. With an area of 2.44 square miles, the population density was 1,067 persons per square mile. There were 1,308 total housing units with an average density of 536 per square mile. Racially, 97.3% of Carthage residents identified themselves as white, 0.3% identified as Black/African American, 0.3% were Native American, and 0.4% identified themselves as Asian. No residents identified themselves as Pacific Islander. 0.5% of the remaining population identified themselves as belonging to some other race, while 1.2% belonged to multiple races. Between all races, 2.0% of the population identified as hispanic or latino.
2007–2011 Census data showed 19.2% of Carthage residents were under the age of 18, while 22.6% of the population was over the age of 65. The median age in Carthage was 44.0 years, and there were 88.3 males for every 100 females. Of residents over the age of 15, 50.8% of persons were married. Of persons over the age of 25, 93.2% had earned at least a high school diploma while 19.2% had earned a bachelor’s degree or higher. 7.2% of persons held a graduate degree.
For census data collected between 2007 and 2011, Carthage’s median (middle) household income was $46,607, with a mean (average) household income of $51,584. The median per-capita income was $22,729. Unemployment was measured to be 7.9%, while 10.7% of persons and 8.8% of families lived with earnings below the federal poverty line.
As of the census of 2000, there were 2,725 people, 1,184 households, and 709 families residing in the city. The population density was 1,698.0 people per square mile (657.6/km²). There were 1,314 housing units at an average density of 818.8 per square mile (317.1/km²). The city’s racial makeup was 98.13% White, 0.48% African American, 0.48% Native American, 0.55% Asian, 0.07% Pacific Islander, 0.04% from other races, and 0.26% from two or more races. Hispanic or Latino of any race were 0.33% of the population.
There were 1,184 households, of which 27.8% had children under the age of 18 living with them, 47.0% were married couples living together, 10.0% had a female householder with no husband present, and 40.1% were non-families. 35.6% of all households were made up of individuals and 17.9% had someone living alone who was 65 years of age or older. The average household size was 2.22 and the average family size was 2.87.
In the city the population was spread out with 23.6% under the age of 18, 7.3% from 18 to 24, 25.4% from 25 to 44, 21.8% from 45 to 64, and 21.9% who were 65 years of age or older. The median age was 40 years. For every 100 females, there were 85.0 males. For every 100 females age 18 and over, there were 79.2 males.
The city’s median household income was $34,677, and the median family income was $50,142. Males had a median income of $36,058 versus $19,972 for females. The city’s per capita income was $18,269. About 3.6% of families and 8.4% of the population were below the poverty line, including 7.3% of those under age 18 and 7.7% of those age 65 or over.