Covid-19 / Coronavirus Updates | North Country Healthcare & Inclusion 603-788-4911 Make Appointment MENU North Country Living Live and Play in Northern New Hampshire! About the town of Lancaster, NH Lancaster, New Hampshire, is part of Coos County. You can view Lancaster venues that host many Lancaster NH events every year. You can also research Lancaster New Hampshire homes for sale by visiting our Lancaster New Hampshire real estate guide. Lancaster New Hampshire has a latitude of 44.4899 and a longitude of -71.5684. Lancaster NH zip code is 03584. Quick Facts About Coos County: Incorporated: 1803 County Seat: Lancaster, NH Land Area: 1800.39 Sq. Miles Population: 33,019 Pop. Density: 19 people/sq. mile Households: 13,961 Median Household Income: $36,587 Median Age: 43.2 years Visit Coos County Website for more detailed town information. Information about NH State Parks: The Mt. Prospect estate was built at the direction of John Wingate Weeks, leading conservationist, U.S. congressman, U.S. senator, and Secretary of War under Presidents Harding and Coolidge. The 420-acre Mt. Prospect estate was given to the state of New Hampshire in 1941 by John Weeks’ children, Katherine Weeks Davidge and Sinclair Weeks. Set at the very top of Mt. Prospect in Lancaster, New Hampshire, the house and grounds provide a 360-degree panorama of mountain splendor, including the Presidential Range of the White Mountains, the Green Mountains of Vermont, the Kilkenny Range, the Percy Peaks, and the upper Connecticut River Valley. Learn more about local NH State Park Attractions Looking for a home up north? The Great North Wood region, or New Hampshire’s North Country (as the locals call it) of New Hampshire features rural splendor and some outstanding real estate values. This region of New Hampshire includes; Lancaster, Berlin, Milan, Dixville Notch, Colebrook, Pittsburg, and the area north to the Canadian border. View real estate listings Related Topics / NEWS / NEWS Sign up for Weeks Email Updates Weeks Medical Center 173 Middle Street Lancaster, NH 603-788-4911 About Us News Phone Directory Follow us on Facebook