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LaSalle County is a county located in the U.S. state of Illinoismarker. As of 2000, the population was 111,509. Its county seat and largest city is Ottawamarker, Illinoismarker .

LaSalle County is part of the Ottawa–Streatormarker Micropolitan Statistical Area. LaSalle County also borders Kendall, Grundy, and DeKalb counties (it shares several communities with them), meaning it is also influenced by the Chicago area.


According to the U.S. Census Bureau, the county has a total area of 1,148 square miles (2,973 km²), of which 1,135 square miles (2,939 km²) is land and 13 square miles (34 km²) (1.14%) is water.

Major highways


Adams, Allen, Brookfield, Brucemarker, Dayton, Deer Park, Dimmick, Eaglemarker, Earl, Eden, Fall River, Farm Ridge, Freedom, Grand Rapids, Groveland, Hope, LaSalle, Manlius, Mendota, Meriden, Miller, Mission, Northville, Oglesby, Ophir, Osage, Ottawa, Otter Creek, Peru, Richland, Rutland, Serena, South Ottawa, Troy Grove, Utica, Vermillion, Wallace, Waltham

Adjacent counties

LaSalle County, Illinois, is one of the few counties in the United States to border as many as nine counties. Illinois has two such counties--LaSalle and Pikemarker.


LaSalle County was formed in 1831 out of Tazewellmarker and Putnam Countiesmarker. It is named for the early French explorer, Robert de LaSalle.


2000 census age pyramid for LaSalle County.
As of the census of 2000, there were 111,509 people, 43,417 households, and 29,827 families residing in the county. The population density was 98 people per square mile (38/km²). There were 46,438 housing units at an average density of 41 per square mile (16/km²). The racial makeup of the county was 94.97% White, 1.55% Black or African American, 0.17% Native American, 0.54% Asian, 0.02% Pacific Islander, 1.71% from other races, and 1.05% from two or more races. 5.19% of the population were Hispanic or Latino of any race. 25.8% were of German, 12.7% Irish, 8.8% Italian, 7.6% Americanmarker, 7.3% English and 7.3% Polish ancestry according to Census 2000. 94.7% spoke English and 3.6% Spanish as their first language.

There were 43,417 households out of which 31.70% had children under the age of 18 living with them, 55.70% were married couples living together, 9.20% had a female householder with no husband present, and 31.30% were non-families. 27.40% of all households were made up of individuals and 13.30% 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 3.04.

In the county the population was spread out with 25.20% under the age of 18, 8.10% from 18 to 24, 28.00% from 25 to 44, 22.30% from 45 to 64, and 16.40% who were 65 years of age or older. The median age was 38 years. For every 100 females there were 97.90 males. For every 100 females age 18 and over, there were 96.40 males.

The median income for a household in the county was $40,308, and the median income for a family was $49,533. Males had a median income of $39,256 versus $22,097 for females. The per capita income for the county was $19,185. About 6.90% of families and 9.10% of the population were below the poverty line, including 13.10% of those under age 18 and 6.20% of those age 65 or over.

Census Population
1840 9,348
1850 17,815
1860 48,332
1870 60,792
1880 70,403
1890 80,798
1900 87,776
1910 90,132
1920 92,925
1930 97,695
1940 97,801
1950 100,610
1960 110,800
1970 111,409
1980 112,033
1990 106,913
2000 111,509

Cities and towns

Election history

  • LaSalle County has voted for the Republican candidate 7 out of 12 times.


LaSalle County is the second largest county by land area in the state of Illinois after McLean Countymarker

LaSalle County is one of the few counties in the United States to border as many as nine counties

The Times newspaper, with a main office in Ottawa and branches in Streator and Marseilles, named the Seven Wonders of La Salle County in July 2007. They are:Hegeler Carus Mansion, La Salle; Effigy Tumuli at Buffalo Rock State Park; Streator Public Library building; Gen. W.H.L. Wallace window at Christ Episcopal Church, Ottawa; Fox River aqueduct; Vermilion River; and Middle East Conflicts Memorial Wall, Marseilles

Disputedly, It is believed that W.D. Boyce founded the Boy Scouts of America in Ottawa, for which the Council is currently named, but the claim is currently in contention.

See also

External links


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