The City of Chicago is the third-largest city in the United States and the largest city in the state of Illinois. The city is located on the shores of Lake Michigan and is known for its architecture, museums, and cultural institutions. The City of Chicago is governed by a mayor and a city council and provides a wide range of services to its residents, including public safety, transportation, and public works. The city is also home to numerous parks and recreational facilities, as well as a vibrant arts and culture scene. The City of Chicago has a diverse economy, with major industries including finance, healthcare, and manufacturing. The city has a population of over 2.7 million people and covers an area of 237 square miles.