Maryland Route 414 (MD 414) (Oxon Hill Road west of I-495/I-95 and Saint Barnabas Road east of I-495/I95) is a state road in Prince George's County in the U.S. state of Maryland. It starts at Harborview Avenue just past MD 210's intersection with the Capital Beltway (I-495/I-95) and the Oxon Hill Park and Ride lot near the National Harbor project and terminates at MD 458, going east passing through the communities of Forest Heights, Oxon Hill including the Rivertowne shopping center, Hillcrest Heights, and Suitland.

Maryland Route 414 begins along Oxon Hill Road at a point west of National Harbor Road intersection. It begins travelling north, and the route spreads to a four-lane divided orientation before this intersection. It curves to the east after, skirting the Capital Beltway before it meets an interchange with MD 210 (Indian Head Highway). This interchange also provides connections to Interstate 295 further west. MD 414 continues eastbound, losing its median to a shared left-turn lane as it passes through the dense retail area of Oxon Hill. After it crosses John Hanson Lane, the route's name changes to Saint Barnabas Road. It then curves northeast, interchanging with the Capital Beltway itself.

The route continues to serve homes and shopping centers as it passes northeast through Marlow Heights, dualizing once again within the town and widening to six lanes. The route also passes by a number of churches. It curves to the north, narrowing again to four lanes, and meets an interchange with MD 5 (Branch Avenue), continuing north through the residential area. Just beyond its intersection with MD 458 (Silver Hill Road), the route curves sharply west and thins to two undivided lanes, following Old Silver Hill Road and passing through Silver Hill. The route then turns onto Bonita Street and follows it to end the MD 414 designation at another MD 5 intersection.

The entire route is in Prince George's County.