The DC Circulator is a bus system in Washington, D.C. The District of Columbia Department of Transportation operates the service in a public–private partnership with RATP Dev.

The DC Circulator buses are similar to shuttle buses since they operate on a predictable fixed route and schedule, and run between the city's main attractions and some of the more popular neighborhoods for visitors. The service began in 2005, and passengers increased as the routes grew from two to five. Ridership peaked in 2011, and has decreased since then. In 2022, the system had a ridership of 1,842,700.

The fare per ride is $1.00. The subsidy per rider is unusually high; in 2016, it averaged $3.32.