Portland serves as the most populous city in the U.S. state of Maine and functions as the county seat of Cumberland County. Situated on a peninsula within Casco Bay on the Gulf of Maine, it lies approximately one hundred miles north of Boston, Massachusetts. The city occupies a strategic coastal position that has historically defined its development and economic interactions with neighboring regions.

First settled in the early 1600s by Christopher Levett, the area endured multiple colonial conflicts before being formally founded as Portland in 1786. Named after the English Isle of Portland, the city emerged from the former town of Falmouth following its burning during the Revolution. Its history includes significant industrial growth through rail and shipping, alongside devastating fires that reshaped its urban landscape.

The city features distinct districts such as the historic Old Port, known for cobblestone streets and preserved warehouses, and Victoria Mansion, an ornate Italianate home from the pre-Civil War era. Notable landmarks include the Portland Museum of Art, the largest public art institution in the state, and the Bayside neighborhood, which has seen rapid development and revitalization in recent decades.

Portland attracts visitors with its walkable urban environment, maritime history, and vibrant creative economy. The Greater Portland area has become an important center for the arts, drawing tourists and new businesses to the old seaport. The city offers numerous walking tours featuring architectural history and serves as a hub for cultural institutions and educational facilities.

The population was 68,408 at the 2020 census, with the metropolitan area reaching approximately 550,000 people. The economy relies mostly on the service sector, while the Port of Portland remains the second-largest tonnage seaport in New England. Accessible via the Portland International Jetport and extensive rail networks, the city experiences a humid continental climate with cold winters and warm summers.