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Dahlgren, Illinois
The Dahlgren railroad depot in 2019
The Dahlgren railroad depot in 2019
Location of Dahlgren in Hamilton County, Illinois.
Location of Dahlgren in Hamilton County, Illinois.
Location of Illinois in the United States
Location of Illinois in the United States
Country United States
State Illinois
County Hamilton
Township Dahlgren
Founded 1872
 • Type Village President (Mayor) and Board of Trustees
 • Total 1.02 sq mi (2.63 km2)
 • Land 1.02 sq mi (2.63 km2)
 • Water 0.00 sq mi (0.00 km2)
Highest elevation
510 ft (155.5 m)
 • Total 504
 • Density 495.58/sq mi (191.31/km2)
Time zone UTC-6 (CST)
 • Summer (DST) UTC-5 (CDT)
ZIP Code(s)
Area code(s) 618
FIPS code 17-18303
Wikimedia Commons Dahlgren, Illinois

Dahlgren is a village in Hamilton County, Illinois, United States. The population was 525 at the 2010 census. It is part of the Mount Vernon Micropolitan Statistical Area.


Dahlgren is located at 38°11′57″N 88°41′9″W / 38.19917°N 88.68583°W / 38.19917; -88.68583 (38.199117, -88.685737). The mean elevation of the village is 155.5 meters (510 feet).

According to the 2010 census, Dahlgren has a total area of 1 square mile (2.59 km2), all land.


Dahlgren had its start in 1870 when the railroad was extended to that point. The village was named for John A. Dahlgren, (1809–1870), a U.S. Navy officer. A post office has been in operation at Dahlgren since 1871.


Historical population
Census Pop.
1880 205
1890 301 46.8%
1900 452 50.2%
1910 654 44.7%
1920 693 6.0%
1930 625 −9.8%
1940 595 −4.8%
1950 609 2.4%
1960 480 −21.2%
1970 487 1.5%
1980 508 4.3%
1990 512 0.8%
2000 514 0.4%
2010 525 2.1%
2020 504 −4.0%
U.S. Decennial Census

As of the census of 2010, there were 525 people, 211 households, and 140 families residing in the village. The population density was 526.92 people per square mile (198.5/km2). There were 242 occupied housing units at an average density of 244.1 per square mile (94.6/km2). There are 31 unoccupied units. The racial makeup of the village was 96% White, 2.5% Black, and 1.5% Hispanic or Latino.

There were 211 households, out of which 30.9% had children under the age of 18 living with them, 52.6% were married couples living together, 30.33% were a single-person households, and 23.5% had someone living alone who was 65 years of age or older. The average household size was 2.49 and the average family size was 3.08.

In the village, the population was spread out, with 20.5% under the age of 15, 11.24% from 15 to 24, 23.24% from 25 to 44, 28.57% from 45 to 64, and 16.57% who were 65 years of age or older. The median age was 39.3 years. For every 100 females, there were 91.6 males. There were 435 persons age 15 or older.

The median income for a household in the village was $32,734, and the median income for a family was $34,886. Males had a median income of $35,313 versus $21,071 for females. The per capita income for the village was $16,944. About 8.39% of families and 15.29% of the population were below the poverty line, including 12.3% of those under age 18 and 26.2% of those age 65 or over.

Commerce and transportation

The depot in 1956 looking SE from 3rd St.

Agriculture remains the primary economic activity in the vicinity of Dahlgren. Other business activity includes retail sales and manufacturing, including the fabrication of custom cabinetry and countertops.

Dahlgren is located on Illinois Route 142 (formerly U.S. Route 460). The nearest access to the interstate highway system (I-64) is 6.5 miles (10.5 km) to the northwest. The Evansville Western Railway (EVWR) (formerly CSX Transportation) provides freight rail service to Dahlgren. CSX divested 120 miles (200 km) of rail line (from Howell Yard in Evansville, Indiana, to Okawville, Illinois) to the Paducah and Louisville Railway (PAL), an operating entity of Four Rivers Transportation, Inc. This was a transaction whereby CSX sold all track, ties and track equipment to PAL and provided a 20-year lease on the right-of-way. Upon completion of the sale on 31 December 2005, PAL transferred all interests to the new Class III operating entity/subsidiary, EVWR, which began operating on 1 January 2006. CSX (formerly the Louisville & Nashville R.R.) retains title to all real estate on which the railroad is situated.

Dahlgren has no passenger services. The nearest airports providing service are Marion Williamson County Regional Airport (MWA), Evansville Dress Regional Airport (EVV) and Lambert-Saint Louis International Airport (STL). The nearest passenger rail connection (Amtrak) is in Centralia, Illinois. Interstate bus service is available in Mount Vernon, Illinois, 15 miles (24 km) to the northwest.

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