I’m a little late on this, as they were announced on Friday August 11th.
BEST NOVEL: The Obelisk Gate, by N. K. Jemisin (Orbit Books)
BEST NOVELLA: Every Heart a Doorway, by Seanan McGuire (Tor.com publishing)
BEST NOVELETTE: “The Tomato Thief”, by Ursula Vernon (Apex Magazine, January 2016)
BEST SHORT STORY: “Seasons of Glass and Iron”, by Amal El-Mohtar (The Starlit Wood: New Fairy Tales, Saga Press)
BEST GRAPHIC STORY: Monstress, Volume 1: Awakening, written by Marjorie Liu, illustrated by Sana Takeda (Image)
Also announced was THE JOHN W. CAMPBELL AWARD FOR BEST NEW WRITER: Ada Palmer (This isn’t a Hugo award, but is usually announced in tandem with the Hugos).
For the rest of the list, and previous year winners you can visit the Hugo Awards website.