State/Lake is an 'L' station serving the CTA's Brown, Green, Orange, Pink, and Purple Lines on The Loop. It is located in the Chicago Loop at 200 North State Street. Like all Loop stations, it has two side platforms. The CTA offers farecard transfers between this station and the Lake subway station on the Red Line. Unlike most stations, there is no in-station transfer between directions.

The Chicago "L" is the rapid transit system serving the city of Chicago and some of its surrounding suburbs in the U.S. state of Illinois. Operated by the Chicago Transit Authority (CTA), it is the fourth-largest rapid transit system in the United States in terms of total route length, at 102.8 miles (165.4 km) long as of 2014, and the third-busiest rapid transit system in the United States. In 2016, the "L" had 1,492 rail cars, eight different routes, and 145 train stations. In 2023, the system had 117,447,000 rides, or about 373,800 per weekday in the fourth quarter of 2023.