The Sonoma Index-Tribune is a 5,300-circulation newspaper covering all of Sonoma and Sonoma Valley. Founded in 1879, the paper is  published twice weekly, on Tuesdays and Fridays, and also produces a website at www.sonomanews.com, a news bulletin emailed to subscribers seven days a week, and several social media feeds.

The Index-Tribune is now owned by Sonoma Media Investments, Inc., which also owns the Press Democrat, the Petaluma Argus-Courier, the North Bay Business Journal and Sonoma Magazine.