|Name origin: Abingdon, Maryland, birthplace of a founder.|
|Townships||Cedar, Indian Point|
|Area||1.46 sq mi (4 km2)|
|- land||1.46 sq mi (4 km2)|
|- water||0.00 sq mi (0 km2)|
|Density||2,475.1/sq mi (956/km2)|
|- summer (DST)||CDT (UTC-5)|
Abingdon is a city in Knox County, Illinois, 50 miles (80 km) west of Peoria. It is part of the Galesburg Micropolitan Statistical Area. The city was first settled in 1828 and was incorporated in 1857. In 1894, the patent for the common spring-loaded mousetrap was awarded to William Hooker of Abingdon. In 1890, 1,321 people lived here; in 1900, 2,022; and in 1910, 2,464. The population was 3,612 at the 2000 census.
Abingdon is located at (40.803572, -90.400770).
According to the 2010 census, Abingdon has a total area of 1.46 square miles (3.78 km2), all land.
As of the census of 2000, there were 3,612 people, 1,422 households, and 984 families residing in the city. The population density was 2,475.1 people per square mile (955.2/km²). There were 1,535 housing units at an average density of 1,051.9 per square mile (405.9/km²). The racial makeup of the city was 98.12% White, 0.55% African American, 0.25% Native American, 0.11% Asian, 0.17% from other races, and 0.80% from two or more races. Hispanic or Latino of any race were 1.14% of the population.
There were 1,422 households out of which 31.8% had children under the age of 18 living with them, 54.1% were married couples living together, 10.8% had a female householder with no husband present, and 30.8% were non-families. 26.2% of all households were made up of individuals and 14.5% had someone living alone who was 65 years of age or older. The average household size was 2.50 and the average family size was 2.99.
In the city the population was spread out with 25.8% under the age of 18, 7.9% from 18 to 24, 27.7% from 25 to 44, 22.6% from 45 to 64, and 16.0% who were 65 years of age or older. The median age was 38 years. For every 100 females there were 90.2 males. For every 100 females age 18 and over, there were 87.3 males.
The median income for a household in the city was $35,642, and the median income for a family was $40,337. Males had a median income of $31,042 versus $20,343 for females. The per capita income for the city was $15,711. About 6.2% of families and 9.9% of the population were below the poverty line, including 11.1% of those under age 18 and 13.5% of those age 65 or over.
- Robert Hugo Dunlap, Captain and Commanding Officer, C Company Iwo Jima; winner of Medal of Honor
- James Stockdale, admiral in the U.S. Navy, winner of Medal of Honor
- William C. Hooker, inventor of the modern mousetrap
- John Mangieri, College Football and Baseball Hall of Fame Inductee Illinois College
- Paul L Mangieri, first Democrat to be elected Knox County State's Attorney in the history of Knox County; first Democrat to be elected circuit wide circuit judge for the Ninth Judicial Circuit since Stephen A. Douglas.
Until July 1, 2013 Abingdon's school district included Hedding Grade School, Abingdon Middle School, and Abingdon High School.
In November 2012 voters approved a school consolidation with Avon. Beginning July 1, 2013 the district became known as Abingdon-Avon CUSD #276. Abingdon is home to Hedding Grade School, which is a PK - 5 attendance center, and Abingdon-Avon High School. Avon also houses a PK - 5 elementary school and Abingdon-Avon Middle School, which serves students in grades 6 - 8.
Abingdon-Avon CUSD #276 serves nearly 1000 students.
The high school enrollment is 289 students. The students selected, "Tornadoes," as the mascot and black, green, and yellow as the school colors.
Hedding College (1855–1930) was named after Methodist Bishop Elizah Hedding. The school merged with Illinois Wesleyan University in 1930.
- Gannett, Henry (1905). The Origin of Certain Place Names in the United States. p. 22.
- Patent of William C. Hooker's animal-trap in Google Patents.
- "Abingdon city, Illinois Fact Sheet". factfinder.census.gov. Washington, DC: U.S. Census Bureau. Retrieved 2008-10-17.
- Callary, Edward (29 September 2008). Place Names of Illinois. University of Illinois Press. p. 1. ISBN 978-0-252-09070-7.
- "US Gazetteer files: 2010, 2000, and 1990". United States Census Bureau. 2011-02-12. Retrieved 2011-04-23.
- "G001 - Geographic Identifiers - 2010 Census Summary File 1". United States Census Bureau. Retrieved 2015-12-25.
- "Annual Estimates of the Resident Population for Incorporated Places: April 1, 2010 to July 1, 2015". Retrieved July 2, 2016.
- "Census of Population and Housing". Census.gov. Archived from the original on May 11, 2015. Retrieved June 4, 2015.
- "American FactFinder". United States Census Bureau. Archived from the original on 2013-09-11. Retrieved 2008-01-31.