STMP

STMP may refer to:


 * Sodium trimetaphosphate (also STMP), a metaphosphate of sodium
 * Stamps.com (Nasdaq ticker: STMP), an American company that provides Internet-based mailing and shipping services
 * STEAP2 (alias: STMP), an enzyme that in humans is encoded by the STEAP2 gene
 * STMP, a chipset series manufactured by SigmaTel