Wanderlust World Wanderlust World Portland is Maine's most populous city, with 68,408 residents as of the 2020 census. It serves as the county seat of Cumberland County and the state's economic and cultural heart. The city is celebrated for its historic Old Port district with cobblestone streets and 19th-century architecture, a bustling working waterfront, a thriving arts scene including the Portland Museum of Art and numerous galleries, and a renowned culinary landscape emphasizing local seafood and farm-to-table dining. Its peninsula location on Casco Bay provides stunning coastal views and access to islands.