Troutdale is a city in Multnomah County, Oregon, United States, immediately north of Gresham and east of Wood Village. As of the 2010 census, the city population was 15,962. The city serves as the western gateway to the Historic Columbia River Highway, the Mount Hood Scenic Byway, and the Columbia River Gorge. It is approximately 12 miles (19 km) east of Portland.
The community was once known as Sandy, after the nearby Sandy River; the post office in Sandy was established in 1854 and closed in 1868. In 1873, the current city of Sandy in Clackamas County, which was formerly named "Revenue", established a different Sandy post office that is still in operation. Troutdale was named by pioneer John Harlow for the trout pond in a dale near his house. Troutdale post office was founded in 1880. In 1925, a company, the Bissinger Wool Pullery, was moved from Sellwood, Oregon, and opened for business on Macadam Road along the west bank of the Sandy River. An iconic water tower stands nearby.