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This Illinois menu page provides access to categorized organizations that are located in this state.  Most of the organizations listed on these category pages primarily serve, and employ, the residents of Illinois.
In 2010, according to United States Census Bureau data, the State of Illinois had an estimated total population of 12,831,000, which is about 4.16 percent of the United States population.  3,129,000 (24.4 percent) of these residents were under 18 years of age, 8,092,000 (63.1 percent) were between 18 and 65 years old, and 1,609,000 (12.5 percent) were over 65 years old.  The median age of Illinois residents was 36.6 years, compared to the median age of 37.2 years for United States residents as a whole.

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Animals Pets Architecture Cleaning Construction Consulting Education Energy Engineering Environment Finance Food Nutrition Health Law Society Marketing Metals Photography Publishing Recreation Restaurants Transportation Weddings
Illinois has a land area of 55,518 square miles, and 0.0 percent of this land area is occupied by National Parks.  According to the USDA's National Agricultural Statistics Service, 75.1 percent (26,700,000 acres) of this land area was occupied by about 76,000 farms.  The state has approximately 231.1 residents per square mile.  Illinois also has 2,398 square miles of inland and Great Lakes water areas.  This interactive map of Illinois shows the state's roads and highways, while this map of Illinois and the surrounding region provides a visual perspective on the state's topography.
In 2010, according to the United States Department of Labor's Bureau of Labor Statistics, the approximately 5,610,700 non-farm employees in Illinois represented about 43.73 percent of the state population.  857,000 of these non-farm employees worked in the government sector; the remainder worked in the private sector. 

Major Illinois Cities *

* Parenthesized values are an approximate measure of economic activity levels.

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