Sandor Ellix Katz (born 1962) is a culinary author, DIY food activist and self-described "fermentation fetishist." He has taught hundreds of food fermentation workshops around the United States and his book Wild Fermentation has been called a classic, "the bible for people embarking on DIY projects like sourdough or sauerkraut", and "especially notorious for getting people excited about fermenting food". In 2009, he was named as one of CHOW Magazine's "CHOW 13" - their top trendsetters and rabble-rousers.

Katz, who is openly gay, grew up in New York City and now lives in a rural, off-the-grid Radical Faerie community in Tennessee.

He was the subject of the song "Human(e) Meat (The Flensing of Sandor Katz)" by punk rock band Propagandhi, a satirical vegan response to the "Vegetarian Ethics and Humane Meat" chapter of Katz's book The Revolution Will Not Be Microwaved.