Jenner is a small coastal town with a population of about 252 in Sonoma County, California, U.S. It is located on the Pacific coast near the mouth of the Russian River. State Route 1 runs through the town and State Route 116 runs nearby, along the Russian River. Immediately south of Jenner is Goat Rock Beach, a unit within the Sonoma Coast State Beach.
Historically, Jenner was part of the Rancho Muniz. In 1867, John Rule bought 4,000 acres (16 km2) of the rancho. When a writer named Charles Jenner moved to the area, Rule encouraged Jenner to build a house in what became known as Jenner Gulch, the site of the town.
Stillwater Cove Regional Park, located 16 miles (26 km) north of Jenner, features picnic facilities, beach access, and a historic one-room schoolhouse.
Jenner received media attention in 2004 after the bodies of Lindsay Cutshall and Jason S. Allen were discovered on Fish Head Beach just north of town. The incident became known as the Jenner, California double-murder of 2004.
As of Census 2000 figures for Jenner's zip code showed that of the primary languages spoken in Jenner 94% spoke English while 6% did not, of those, 2% spoke French, 2% spoke Spanish, 1% spoke German, 1% spoke Urdu, and less than 1% spoke a native american language.