MNB

MNB may refer to:


 * MNB (TV channel), a Mongolian public television channel
 * Merchants National Bank (disambiguation), several U.S. banks
 * Monday Night Baseball, a live game telecast of Major League Baseball
 * Mongolian National Broadcaster, a public service broadcaster in Mongolia
 * Moody National Bank, a bank in Galveston, Texas
 * Belgian National Movement, a World War II Belgian Resistance group
 * Hungarian National Bank (Magyar Nemzeti Bank), the Hungarian name of the central bank of Hungary
 * Menadione Nicotinamide Bisulfite, a synthetic chemical compound – see Menadione