The most populous cities in area code 815 are: Chicago, Rockford, Joliet, Dekalb, and Plainfield.
Other cities in the 815 area code include: Crystal Lake, Romeoville, Northbrook, McHenry, Kankakee, New Lenox, Belvidere, Woodstock, Lockport, Freeport, Loves Park, Ottawa, Yorkville, Sycamore, Sterling, Dixon, Morris, La Grange Park, Streator, Pontiac, Roscoe, La Salle, Harvard, Utica, Rochelle, Rock Falls, Manteno, Marengo, Princeton, Rockton, South Beloit, Manhattan, Mendota, Braidwood, Wilmington, Spring Grove, Spring Valley, Watseka, Genoa, Marseilles, Poplar Grove, Morrison, Oglesby, Wonder Lake, Oregon, Byron, Fairbury, Fulton, Galena, Cherry Valley, Momence, Mount Morris, Winnebago, Savanna, Lena, Seneca, Sheridan, Amboy, Pecatonica, Elwood, Polo, Prophetstown, Hinckley, Richmond, Stockton, Capron, Chenoa, Forreston, Gilman, East Dubuque, Earlville, Kirkland, Walnut, Mount Carroll, Lanark, Waterman, Clifton, Herscher, Warren, Saint Anne, Toluca, Durand, Granville, Onarga, Hebron, Maple Park, Grant Park, Milford, Gardner, Sheldon, Ladd, Chebanse, Newark, Forrest, Stillman Valley, Flanagan, Franklin Grove, Milledgeville, Malta, Ashton, Chatsworth, Wyanet, Shabbona, Mazon, Odell, Orangeville, Piper City, Tiskilwa, Pearl City, Leland, La Moille, Cissna Park, Hennepin, Paw Paw, Tonica, Elizabeth, Sheffield, Ashkum, Crescent City, Lyndon, Davis, Hanover, Shannon, Leaf River, Tampico, Danforth, Cullom, Grand Ridge, Chadwick, Thomson, Scales Mound, Dakota, German Valley, Union, Ohio, Monroe Center, Apple River, Sublette, Lostant, Cornell, Ransom, Saunemin, Reddick, Martinton, Magnolia, Steward, Beaverville, Malden, Mc Nabb, Wellington, Winslow, Compton, Verona, Donovan, Rutland, Caledonia, Long Point, Garden Prairie, West Brooklyn, Harmon, Kempton, Strawn, Kinsman, Emington, Cabery, Coal City, Dwight, Frankfort, Graymont, Mc Connell, Minooka, Putnam, Sandwich, Somonauk, and Wenona.
Chicago, officially the City of Chicago, is the third-most populous city in the United States. With over 2.7 million residents, it is the most populous city in the state of Illinois, and the Midwestern United States. It is the county seat of Cook County. The Chicago metropolitan area, often referred to as Chicagoland, has nearly 10 million people and is the third-largest in the U.S. Chicago is called the architecture capital of the United States. In terms of wealth and economy, Chicago is considered one of the most important business centers in the world. Chicago was incorporated as a city in 1837, near a portage between the Great Lakes and the Mississippi River watershed, and grew rapidly in the mid-nineteenth century. Positioned along Lake Michigan, the city is an international hub for finance, commerce, industry, technology, telecommunications, and transportation: O'Hare International Airport is the second- busiest airport in the world when measured by aircraft traffic ; the region also has the largest number of U.S. highways and rail road freight. In 2012, Chicago was listed as an alpha global city by the Globalization and World Cities Research Network, and ranked seventh in the world in the 2016 Global Cities Index. Chicago has the third-largest gross metropolitan product in the United States—about $640 billion according to 2015 estimates. The city has one of the world's largest and most diversified economies with no single industry employing more than 14% of the workforce. In 2016, Chicago hosted over 54 million domestic and international visitors, a new record making it one of the top visited cities in the nation. Landmarks in the city include Millennium Park, Navy Pier, the Magnificent Mile, Art Institute of Chicago, Museum Campus, the Willis (Sears) Tower, Museum of Science and Industry, and Lincoln Park Zoo. Chicago's culture includes the visual arts, novels, film, theater, especially improvisational comedy, and music, particularly jazz, blues, soul, hip hop, gospel and house music. There are many colleges and universities in the Chicago area; among these, Northwestern University, University of Chicago, and the University of Illinois at Chicago are classified as "highest research" doctoral universities. Chicago also has professional sports teams in each of the major professional leagues. The city has many nicknames, the best-known being the Windy City.
Rockford is the third largest city in the U.S. state of Illinois, the 171st most populous city in the United States, the largest city in Illinois outside of the Chicago metropolitan area, and the city of the 148th most populous metropolitan area in the United States. It is the county seat of Winnebago County and is located on both banks of the Rock River in far northern Illinois. According to 2010 census data, the City of Rockford had a population of 152,871, with an outlying metropolitan area population of 348,360, which was estimated to have decreased to 150,251 and 344,623, respectively, by July 2013. Settled between 1834 and 1835, Rockford was strategically positioned between Chicago and Galena and thus became suitable for industrial development. Rockford was notable for its output of heavy machinery and tools; by the twentieth century, it was the second leading center of furniture manufacturing in the nation, and 94th largest city. Its decline, emblematic of other cities in the Rust Belt, led to economic diversification into automotive, aerospace, and healthcare industries, as well as the undertaking of various tourism and downtown revitalization efforts.Referred to as the Forest City, Rockford is known for various venues of cultural or historical significance, including Anderson Japanese Gardens, Klehm Arboretum, Tinker Swiss Cottage, the BMO Harris Bank Center, the Coronado Theatre, the Laurent House, and the Burpee Museum of Natural History. Its contributions to music are noted in the Mendelssohn Club, the oldest music club in the nation, and performers such as Phantom Regiment and Cheap Trick.
149,395 (2016) Joliet (/ ˈ dʒ oʊ l i. ɛ t / or / dʒ oʊ l i ˈ ɛ t /) is a city in Kendall and Will counties in the U.S. state of Illinois, 40 miles (64 km) southwest of Chicago. It is the county seat of Will County. At the 2010 census, the city was the fourth largest in Illinois, with a population of 147,433. A special census done in 2016 puts Joliet's population at 149,395 making it the 3rd largest city in Illinois.
The 815 area code lies within the Central Daylight Time Zone (or CDT). The current time in Central Daylight Time is 3:06 PM on Apr 20, 2021.
