Forestville is a census-designated place in Sonoma County, California, United States. It was settled during the late 1860s and was originally spelled Forrestville after one of its founders. The spelling long ago became standardized with one "r". The population was 3,293 at the 2010 census, an increase of nearly 1,000 since the 2000 census. By 1900, the community was known for attracting writers and artists and had a bohemian reputation. The small town has a limited number of businesses.