B73

B73 or B-73 may refer to:
 * Bundesstraße 73, a German road
 * Sicilian Defense, Dragon Variation, according to the Encyclopaedia of Chess Openings
 * Sutton Coldfield, according to the list of postal districts in the United Kingdom
 * HLA-B73, an HLA-B serotype
 * B73 (maize), a long-established maize genome