W17 or W-17 may refer to:
British NVC community W17, a woodland community in the British National Vegetation Classification system Hansa-Brandenburg W.17, a German flying boat fighter Mercedes-Benz 120, a prototype rear-engined car Snub cube Water-jugs-in-stand (hieroglyph), an Egyptian hieroglyph Watkins 17, an American sailboat design Wesseler W 17, an agricultural tractor Williams W-17 Stinger, an American racing aircraft W17 Trimaran An 17ft high performance Trimaran Designed by Mike Walters.