Gregory J. "Greg" Nickels (born August 7, 1955) is the 51st and current mayor of Seattle, Washington. He took office on January 1, 2002.

Nickels, the oldest of six siblings, was born in Chicago to Bob and Kathie Nickels. In 1961, his family moved to Seattle, where he graduated from Seattle Preparatory School and attended the University of Washington, but did not graduate.

He now lives in West Seattle with his wife Sharon. They have two children, Jacob and Carey. In August 2007, his son Jacob pled guilty to one count of conspiracy for his part in a multi-state casino-cheating ring that stole money from casinos by bribing casino employees to false shuffle decks of cards.