Route 27 is a bus route operated by the Maryland Transit Administration in Baltimore. The line currently runs from the Reisterstown Plaza Metro Subway Station in northwest Baltimore to Port Covington in South Baltimore through downtown. The line also serves the communities of Pimlico, Mt. Washington, Cross Keys, Hampden, and Cherry Hill, and the Greyhound bus terminal. The bus route is the successor to the 10 Roland Park, 12 Westport, and 25 Mount Washington streetcar lines.