Chicago is the seat of Cook County, the second-most populous county in the U.S. Chicago was incorporated as a city in 1837 near a portage between the Great Lakes and the Mississippi River watershed.

Welcome to the official City of Chicago Website. The source for information about City services, departments, programs and initiatives, and officials for Chicago residents, businesses, and visitors.

Chicago is celebrating its 9th year as the Best Big City in the U.S.! Explore iconic attractions, hidden gems, and travel guides. Plan the perfect Chicago trip!

Must-visit attractions in Chicago include the Navy Pier, Wrigley Field, Second City, Skydeck Chicago, and of course, "The Bean." Find more fun things to do in Chicago.

Not sure what to do in Chicago? Check out these essential attractions, amazing nightlife and cultural institutions and more.

50 Best Things to Do in Chicago According to Locals in 2026

Planning to visit Chicago? We have everything you need, from upcoming events to delicious food and things to do in Chicago.

Where is Chicago located on the map? Chicago is located in northeastern Illinois on the southwestern shores of freshwater Lake Michigan.

Where is Chicago, IL? / Where is Chicago on the US Map, Geography & Facts

Discover 169 hidden attractions, cool sights, and unusual things to do in Chicago from Oz Park to Green Mill Jazz Club.