At one time, odd numbered routes were express routes, but that distinction has been abandoned. Odd-numbered routes are typically part-time variants of even-numbered routes. Metrobus routes in Northern Virginia have one or two numbers followed by a letter (1A, 16C, 29N, etc.).Metrobus routes in Prince George's County, MD, have a letter followed by two numbers (F12, J12, P12, etc.).Metrobus routes in Montgomery County, MD, have a letter followed by a number (C4, Q4, Z6, etc.).Metrobus routes in Washington, D.C., have either a two digit number (31, 42, 64, etc.) or a letter followed by a number (A2, S2, X8, etc.).Most Metrobus routes follow the rules below: List of Metrobus routes in Washington, D.C.

The list of Metrobus routes has been split by region: Many are the descendants of streetcar lines operated by the Capital Transit Company or its predecessors. This is a list of bus routes operated by the Washington Metropolitan Area Transit Authority (WMATA), branded as Metrobus. Route T17 was replaced by routes G12 & G14 on December 17, 2010. WMATA Orion V 9652 (now retired) at Greenbelt station in Prince George's County, Maryland, headed for New Carrollton.

Metro bus schedules