Click Here for the latest in Cumberland County Maine Listings ~  Cumberland County is a county located in the U.S. state of Maine. As of 2000, the population was 265,612. Its county seat is Portland and is the most populous of the sixteen Maine counties, as well as the most affluent. Cumberland County has the deepest and second largest body of water in the state, Sebago Lake, which supplies tap water to most of the county. The county is the economic and industrial center of the state having the resources of the Port of Portland, the Maine Mall and having corporate headquarters of major companies such as Fairchild Semiconductor, IDEXX Laboratories, UnumProvident and TD Banknorth. Cumberland County is part of the Portland–South Portland–Biddeford, Maine, Metropolitan Statistical Area.Cumberland County was founded in 1760 from a portion of Yorkshire County.Cities and towns

• Baldwin
• Bridgton
• Brunswick
• Cape Elizabeth
• Casco
• Chebeague Island
• Cumberland
• Falmouth
• Freeport

• Frye Island
• Gorham
• Gray
• Harpswell
• Harrison
• Long Island
• Naples
• New Gloucester
• North Yarmouth

• Portland
• Pownal
• Raymond
• Scarborough
• Sebago
• South Portland
• Standish
• Westbrook
• Windham
• Yarmouth