TNB

TNB may stand for:
 * Trinitrobenzene, kinds of nitrated benzene-derivatives
 * Tacoma Narrows Bridge, Washington state, US
 * Throgs Neck Bridge, New York City, US
 * TNB frame (Tangent-Normal-Binormal), a mathematical coordinate system
 * Tenaga Nasional Berhad, an electricity company in Malaysia
 * National Theatre Bucharest (Teatrul Naţional "Ion Luca Caragiale" București)
 * The National Bank (Palestine)
 * Transthoracic needle biopsy, a type of lung biopsy
 * Tuas Naval Base, the second naval base of the Republic of Singapore Navy