Wiesendanger Falls, also known as Double Falls and Twanklaskie Falls, is a 50-foot waterfall on the Columbia River Gorge, Multnomah County, Oregon, United States. Its main drop is 50 feet and is located upstream of Multnomah Falls and accessed through the Multnomah-Wahkeena Loop Hike.

The name of the waterfall is from Albert Wiesendanger, a notable USDA Forest Service worker in the first half of the 20th century. The name is spelled "Wiesendanger" on a commemorating plaque on the trail to the waterfall, with the "i" before the "e". Other sources spell the vowels in reverse, the "e" before the "i".

• List of waterfalls in Oregon