STZ

STZ may refer to:


 * Snowbird Tectonic Zone, a geological boundary in the Canadian Shield
 * Stalingrad Tractor Factory (Russian: Stalingradskiy traktornyy zavod), now known as Volgograd Tractor Factory
 * Stanozolol (STZ), an anabolic steroid
 * Streptozotocin (streptozocin, STZ, Zanosar) is a naturally occurring chemical
 * STZ, NYSE ticker symbol for Constellation Brands
 * STZ TV, a Brazilian TV station