What is the capital city of Illinois?

Springfield is the capital city of Illinois due to its historical significance and strategic location. It became the state capital in 1837, chosen for its central location in the state, which made it more accessible to a larger number of residents across Illinois compared to other cities. Springfield is also known for its connection to Abraham Lincoln, who lived there for many years and is a prominent figure in Illinois history. The city's role as the political center of the state is evidenced by the presence of the Illinois State Capitol building, where the legislative activities of the state government take place.

While Chicago is the largest city in Illinois and serves as a major economic hub, it was not designated as the capital. Peoria and Bloomington, though important cities within the state, do not hold the status of capital and thus do not play the same central role in Illinois government and politics as Springfield does.