BMX (disambiguation)

BMX may refer to:
 * BMX, a sport of racing on bicycles on motocross style tracks
 * BMX bike, a bicycle used for casual use and sport, and designed mainly for dirt and motocross cycling
 * Big Mountain Air Force Station (IATA: BMX), a military use airstrip located near Big Mountain, Alaska
 * Cytoplasmic tyrosine-protein kinase BMX, an enzyme that in humans is encoded by the BMX gene
 * BMX (quadraphonic sound), a quadrophonic sound system