Cumberland County, Maine
Cumberland County | |
|---|---|
Location within the U.S. state of Maine | |
Maine's location within the U.S. | |
| Coordinates: 43°47′04″N 70°19′41″W / 43.784477°N 70.32798°W | |
| Country | United States |
| State | Maine |
| Founded | November 1, 1760 |
| Named after | Prince William, Duke of Cumberland |
| Seat | Portland |
| Largest city | Portland |
| Area | |
• Total | 1,217 sq mi (3,150 km2) |
| • Land | 835 sq mi (2,160 km2) |
| • Water | 383 sq mi (990 km2) 31% |
| Population (2020) | |
• Total | 303,069 |
• Estimate (2021) | 305,231 |
| • Density | 250/sq mi (96/km2) |
| Time zone | UTC−5 (Eastern) |
| • Summer (DST) | UTC−4 (EDT) |
| Congressional district | 1st |
| Website | cumberlandcountyme |
Cumberland County is a county in the U.S. state of Maine. As of the 2020 census, the population was 303,069, making it the most populous county in Maine. Its county seat is Portland. Cumberland County was founded in 1760 from a portion of York County, Province of Massachusetts Bay, and named for William, Duke of Cumberland, a son of King George II. 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 state's economic and industrial center, having the resources of the Port of Portland, the Maine Mall, and having corporate headquarters of major companies such as onsemi, IDEXX Laboratories, Unum, and TD Bank. Cumberland County is part of the Portland–South Portland, ME Metropolitan Statistical Area.