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Sandwich, Illinois
Sandwich Water tower.jpg
The water tower near the township hall in Sandwich, Illinois
Nickname: The Fair City
Country United States
State Illinois
Counties DeKalb, Kendall, LaSalle
Townships Sandwich, Little Rock, Northville
Elevation 669 ft (204 m)
Coordinates 41°39′00″N 88°37′02″W / 41.65000°N 88.61722°W / 41.65000; -88.61722
Area 4.71 sq mi (12 km²)
 - land 4.69 sq mi (12 km²)
 - water 0.02 sq mi (0 km²)
Population 7,421 (2010)
Density 1,582.3 /sq mi (611 /km²)
Founded 1859
 - location Railroad and Pearl Streets
Mayor Rick Olson
Timezone CST (UTC-6)
 - summer (DST) CDT (UTC-5)
ZIP code 60548
Area code 815, 779

Sandwich is a city in DeKalb, Kendall, and LaSalle counties in the U.S. state of Illinois. The population was 7,421 at the 2010 census.


The town is inexorably tied to politician "Long John" Wentworth and his efforts to move the State of Illinois border with Wisconsin from being even with the bottom of Lake Michigan to its present location. If those efforts had not been successful, the State Line would actually reside along the LaSalle-DeKalb County border, splitting parts of Sandwich from the main areas of the incorporated community. The community was established when Almon Gage sought a railroad stop on the Chicago, Burlington and Quincy Railroad that ran through town. Originally naming it Newark Station, (not to be confused with the nearby village of Newark), he and Wentworth worked extensively to create the community and also to get the railroad stop created. In honor of his efforts, Wentworth was given the opportunity to name the town. He named it after his home of Sandwich, New Hampshire. The city's Wentworth Apartments and Wentworth Street are named after Mr. Wentworth.

Sandwich Fair

Sandwich is the home of the Sandwich Fair, which first started as an annual livestock show in DeKalb County. Held yearly, the Wednesday-Sunday after Labor Day since 1888, it is one of the oldest continuing county fairs in the state of Illinois, drawing daily crowds of more than 100,000, with the top attendance days reaching more than 200,000 fair-goers.


Sandwich is located at 41°39′00″N 88°37′02″W / 41.65000°N 88.61722°W / 41.65000; -88.61722 (41.6499062, -88.6172910), at an elevation of 669 feet (204 m). According to the 2010 census, Sandwich has a total area of 4.706 square miles (12.19 km2), of which 4.69 square miles (12.15 km2) (or 99.66%) is land and 0.016 square miles (0.04 km2) (or 0.34%) is water.


Within the city limit of Sandwich, there are a network of creeks, which either connect to Somonauk Creek (Lake Holiday), Little Rock Creek, or to the Fox River. Lake Davis, which stretched from Veterans Memorial Park to what is now Gletty Road, was drained early in the 19th Century to open up additional farmland. The Sandwich town site was built on a natural gradation due to a geological fault line known as the Sandwich Fault, so the city stands on a hillside. The southeast corner of the city is the lowest spot, roughly near the Harvey Creek Preserve, as well as near Little Rock Creek. The last earthquake along the Sandwich Fault was on February 10, 2010, with a previous tremor being reported in January 2007.

In the immediate area of Sandwich, there are numerous communities which straddle county borders. Sandwich and Somonauk are split by the LaSalle-DeKalb County Line, while the unincorporated community of Welland is split along the border of LaSalle and Lee counties further West; and Millington, Stavanger, and Seneca are also split along the county lines South of Sandwich.


Sandwich's climate typified by large seasonal temperature variances, with warm to hot (and often humid) summers and cold (sometimes severely cold) winters. The Köppen Climate Classification subtype for this climate is "Dfa". (Hot Summer Continental Climate).


Historical population
Census Pop.
1860 952
1870 1,844 93.7%
1880 2,352 27.5%
1890 2,516 7.0%
1900 2,520 0.2%
1910 2,557 1.5%
1920 2,409 −5.8%
1930 2,611 8.4%
1940 2,608 −0.1%
1950 3,027 16.1%
1960 3,842 26.9%
1970 5,056 31.6%
1980 5,356 5.9%
1990 5,567 3.9%
2000 6,509 16.9%
2010 7,421 14.0%
Est. 2015 7,366 −0.7%
U.S. Decennial Census

As of the census of 2010, there were 7,421 people and 3,005 households in the city. The racial makeup of the city was 90.9% White, 0.5% African American, 0.2% Native American, 0.8% Asian, and 2.1% from two or more races. Hispanic or Latino of any race were 12.6% of the population.

As of the 2010 census, the population density was 1,582.3 inhabitants per square mile (610.9/km2). There were 2,876 housing units at an average density of 613.2 per square mile (236.8/km2). The average household size was 2.52. The median value of owner-occupied housing units was $197,000.

In the city, the population was spread out with 6.5% under the age of 5, 25.7% under the age of 18, and 13.5% who were 65 years of age and over. 50% of the population was female.

The median income for a household in the city was $57,610. The per capita income for the city was $26,703. About 5.5% of the population was below the poverty line.

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