ST4

ST4 or ST-4 may refer to:


 * The Monospar ST-4, a variant of the Monospar aircraft, built by British aircraft manufacturer General Aircraft Limited.
 * The Snow Trac ST4, a model in the Snow Trac family of Snowcat vehicles.
 * The Ducati ST4s, a motorcycle manufactured by Ducati.
 * Star Trek IV: The Voyage Home, a science fiction film in the Star Trek series.
 * Starship Troopers: Invasion, fourth entry in the Starship Troopers film series.
 * A popular Autoguider port in amateur astronomy