Helvetia is a small unincorporated community in Washington County, Oregon. It is located in the Tualatin Valley along U.S. Route 26 northwest of Portland. It was named by Swiss immigrants to Oregon in the 19th century. Notable features are the church, cemetery, the Rice Mineral Museum, Helvetia Vineyards and Winery, which is co-owned by former U.S. Congresswoman Elizabeth Furse, Roloff Farms, and the Helvetia Tavern.
The reality television series Little People, Big World is set on Roloff Farms in Helvetia, prompting it to become a popular tourist attraction. The area is part of Washington County Fire District 2.