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The DC Circulator is a bus system in Washington, D.C.. The District of Columbia Department of Transportation, the Washington Metropolitan Area Transit Authority, and DC Surface Transit operate the service in a public-private partnership with First Transit.

The DC Circulator buses are similar to shuttles since they operate on a predictable fixed route and schedule, and run between the city's main attractions and most popular neighborhoods for visitors. The service has seen increasing year-on-year ridership since it began service in 2005.