9B, 9b or IX-B may refer to: Route 9B (WMATA), a bus route operated by the Washington Metropolitan Area Transit Authority Stalag IX-B, a World War II German Army prisoner of war camp at Wegscheide close to Bad Orb 9B (TV series), a 1988 TV series with Canadian actor Zachary Ansley Boron-9 (9B), an isotope of boron HAT-P-9b, an extrasolar planet
See also List of highways numbered 9B B9 (disambiguation)