Doon is a suburban community and former village which is now a part of the city of Kitchener, Ontario, Canada. Doon was settled around 1800 by German Mennonites from Pennsylvania, and after 1830 by Scottish immigrants. The area is located at the confluence of Schneider Creek and the Grand River. The post office was opened in 1845. A large flour mill, oatmeal mill, distillery and sawmill were built on the Doon River over the following years. The Perine brothers established extensive linen works and flax mills near the settlement. By 1870, there was a single church, Presbyterian, a variety of tradesmen and a population of 200.