Geyserville (formerly Clairville) is an unincorporated community and census-designated place (CDP) in Sonoma County, California, United States.

Located in the Wine Country, Geyserville has a small selection of restaurants, bed and breakfasts, and wineries.

Geyserville, located on the Rancho Tzabaco Mexican land grant, owes its foundation to the discovery in 1847 of a series of hot springs, fumaroles, and steam vents in a gorge in the mountains of Sonoma County, California, between Calistoga and Cloverdale.

After the San Francisco and North Pacific Railroad was extended to Cloverdale in the 1870s, its trains stopped in Geyserville.

[4] According to the United States Census Bureau, the CDP covers an area of 4.6 square miles (11.9 km2), all of it land.

The Northwestern Pacific right-of-way is expected to be reactivated for Sonoma–Marin Area Rail Transit service when the line is rebuilt to Cloverdale, but Geyserville is not planned to receive a stop.