Elmshaven, Historic site and museum in St. Helena, United States.

Elmshaven is a two-story redwood frame house with shiplap siding, a square turret at the right front corner topped by a pyramidal roof, and a projecting gable section on the main facade. The property also includes a tank house for a large water tank and a two-story wood-frame outbuilding used as an office, library, and storage vault.

The residence was built in 1885 by railroad developer Robert H. Pratt and purchased by Ellen G. White in 1900. She named it after the elm trees that once stood at the property's front.

Ellen G. White wrote approximately 60 religious books here and shaped the global growth of the Seventh-day Adventist Church. Her work in this house profoundly influenced the religious movement.

Elmshaven stands on the east side of Glass Mountain Lane in a rural-residential area north of downtown St. Helena. The grounds include the main house, a tank house for a large water tank, and a two-story wood-frame outbuilding that served as office, library and storage vault. Visitors tour the house and these outbuildings; allow time to move between the two floors of the main house.

Elmshaven is the only National Historic Landmark in Napa County, a status granted in 1993. In 2020 wildfires threatened the property, but the house was not damaged. Of all the places Ellen G. White lived, it is the best preserved and the one where she stayed longest.