Lebanon is a town in York County, Maine, United States. The population was 6,469 at the 2020 census. Lebanon includes the villages of Center Lebanon, West Lebanon, North Lebanon, South Lebanon, and East Lebanon. It is the westernmost town in Maine. Lebanon is part of the Portland–South Portland–Biddeford, Maine metropolitan statistical ar…Lebanon is a town in York County, Maine, United States. The population was 6,469 at the 2020 census. Lebanon includes the villages of Center Lebanon, West Lebanon, North Lebanon, South Lebanon, and East Lebanon. It is the westernmost town in Maine. Lebanon is part of the Portland–South Portland–Biddeford, Maine metropolitan statistical area.