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.

Things to Do in Chicago, Illinois: See Tripadvisor's 1,161,287 traveler reviews and photos of Chicago tourist attractions. Find what to do today, this weekend, or in May.

Chicago is a city, the seat of Cook county, in northeastern Illinois, U.S. With a population of nearly three million, Chicago is the state’s largest and the country’s third most populous city. It is the commercial and cultural hub of the American Midwest. Learn more about Chicago in this article.

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

Uncover the energy, culture, and charm at the heart of the Windy City. From bustling streets to vibrant nightlife, Chicago keeps you moving. Dive into diverse districts, each with its own unique story and flavor. Marvel at architectural wonders like Willis Tower and the John Hancock Center.

Guide to the best hotels and things to do in Chicago. Maps, travel tips and more.

Enjoy easy public transport to downtown Chicago and Wrigley Field, and easy access to beautiful beaches and attractions like Northwestern University, the Chicago Botanic Garden, and the Baha'i House of Worship, along with world-class dining and shopping.