Milwaukee County Transit System
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 MCTS buses in Downtown Milwaukee | |
| Founded | June 1, 1975 (51 years ago) |
|---|---|
| Headquarters | 1942 North 17th Street Milwaukee, Wisconsin |
| Service area | Milwaukee, Ozaukee, and Waukesha counties |
| Service type | |
| Routes | 48 |
| Stops | 4,591 |
| Stations | 2 |
| Depots |
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| Fleet | 369 buses |
Daily ridership | 66,700 (weekdays, Q2 2026) |
Annual ridership | 25,328,400 (2025) |
| Operator | Milwaukee Transport Services, Inc. |
Chief executive | Steve Fuentes |
| Website | ridemcts |
The Milwaukee County Transit System (MCTS) is the largest transit agency in Wisconsin, and is the primary transit provider for Milwaukee County. The agency ranks among the top 50 transit agencies in the United States in total passenger trips. The agency is partly managed by the quasi-governmental agency Milwaukee Transport Services, Inc. Its bus fleet consists of 369 buses. In 2025, the system had a ridership of 25,328,400, or about 66,700 per weekday as of the second quarter of 2026.