B33

B33 may refer to:
 * Bundesstraße 33, a German road
 * Strathalbyn Road, a road in South Australia
 * XB-33 Super Marauder, an experimental aircraft
 * Horsehead Nebula, astronomical designation B33
 * Avia B-33, a Czech built Ilyushin Il-10
 * B33 (New York City bus), a former bus route in New York City