The Twin City Rapid Transit Company (TCRT), also known as Twin City Lines (TCL), was a transportation company that operated streetcars and buses in the Minneapolis-St. Paul metropolitan area in the U.S. state of Minnesota. Other types of transportation were tested including taxicabs and steamboats, along with the operation of some destination sites such as amusement parks. It existed under the TCRT name from a merger in the 1890s until it was purchased in 1962. At its height in the early 20th century, the company operated an intercity streetcar system that was believed to be one of the best in the United States. It is a predecessor of the current Metro Transit bus and light rail system that operates in the metro area.

Metro Transit is the primary public transportation operator in the Minneapolis–Saint Paul area of the U.S. state of Minnesota and the largest operator in the state. Metro Transit has previously been ranked as one of the best public transit systems in the United States. In 2023, the system had a ridership of 44,977,200, or about 145,600 per weekday as of the fourth quarter of 2023.