TransIT Services of Frederick County is a public transportation agency in Frederick County, Maryland, that is operated by the county government. The agency currently operates 9 Connector bus routes, mostly in the city of Frederick, 5 shuttles, and demand-response for seniors and persons with disabilities. TransIT provides connections to other public transportation services in the region, including the MTA Maryland's routes 204 and 515 commuter bus and MARC Train service. According to the agency's homepage, the service had approximately 909,800 boardings in FY 2012.TransIT Services is the result of merging the former Trans-Serve Frederick County shuttles and the Frederick City Transit lines.
Connector bus routes operate Monday–Friday, and routes 10–65 also provide Saturday service. The agency does not operate any of its routes on Sunday. Most routes provide weekday peak-hour service (every 30 minutes) in addition to hourly service Monday–Friday.