Coös County, New Hampshire

Coos County, New Hampshire
Coös County Courthouse in Lancaster
Location in the U.S. state of New Hampshire
New Hampshire's location in the U.S.
Founded	1803
Seat	Lancaster
Largest city	Berlin
Area
• Total	1,830 sq mi (4,740 km2)
• Land	1,795 sq mi (4,649 km2)
• Water	35 sq mi (91 km2), 1.9%
Population
• (2010)	33,055
• Density	18/sq mi (7/km²)
Congressional district	2nd
Time zone	Eastern: UTC-5/-4
Website	www.cooscountynh.us

Coös County (/ˈkoʊ.ɒs/, with two syllables), frequently spelled Coos County, is a county in the state of New Hampshire, in the United States. As of the 2010 census, the population was 33,055, the least of any New Hampshire county. The county seat is Lancaster.

The two-syllable pronunciation is sometimes indicated with a dieresis, notably in the Lancaster-based weekly newspaper The Coös County Democrat and on some county-owned vehicles. The county government uses both spellings interchangeably.

Coös County is part of the Berlin, NH–VT Micropolitan Statistical Area. It is the only New Hampshire county on the Canada–United States border, south of the province of Quebec, and thus is home to New Hampshire's only international port of entry, the Pittsburg-Chartierville Border Crossing.

Coös County includes the whole of the state's northern panhandle. Major industries include forestry and tourism, with the once-dominant paper-making industry in sharp decline. The county straddles two of the state's tourism regions. The southernmost portion of the county is part of the White Mountains Region and is home to Mount Washington. The remainder of the county is known as the Great North Woods Region.