D39

D39 may refer to:


 * Akaflieg Darmstadt D-39, a German motor glider
 * D39 road (Croatia)
 * HMAS Hobart (D 39), a Perth-class destroyer of the Royal Australian Navy
 * HMS Amazon (D39), a prototype destroyer of the Royal Navy
 * Queen's Gambit Declined, a chess opening
 * Wilmette Public Schools District 39
 * D39, an Egyptian hieroglyph
 * PRR D39, a Pennsylvania Railroad 4-4-0 steam locomotive