Richmond is a town in Sagadahoc County, Maine, United States. The population was 3,411 at the 2010 census. It is part of the Portland–South Portland–Biddeford, Maine metropolitan statistical area.Richmond is the departure point for state boat service to Swan Island, site of the Steve Powell Refuge and Wildlife Management Area. Swan Island is a major tourist attraction that draws over 4,000 people each year. It's beautiful landscape and peaceful waters is a beautiful place to visit, especially in the fall and summer months. Educational tours are also offered for children.Each year, the town of Richmond hosts a summer event called "Richmond Days". Everyone is welcome to attend and the activities are family friendly. They offer tours to swan island, fireworks, refreshments, and much more.