Pittsburg is a town in Coös County, New Hampshire, United States.

Pittsburg derives its name from William Pitt, Prime Minister of Great Britain.

[3] Prior to its incorporation in 1840, the area was settled c. 1810 and known as the Territory of Indian Stream.

It had the unique distinction of having been its own microstate briefly during the 1830s, called the Republic of Indian Stream, due to an ambiguous boundary between the United States and Canada.

Early maps (e.g. 1854) also show several grants that were incorporated into the eastern edge of Pittsburg, including Carlisle No.

Mount Magalloway, elevation 3,383 feet (1,031 m), is a prominent summit reachable by hiking trail.

[9] Pittsburg is a destination for snowmobile and ATV enthusiasts year round.

In the winter months thousands of people visit Pittsburg to take advantage of the state-funded and club-supported and maintained trails that can bring snowmobilers from elsewhere in the state of New Hampshire to Pittsburg, with access to the states of Maine, Vermont and the border crossing to Canada.

Two sections of the Connecticut River are fly fishing only, including the "Trophy Stretch".

There are maps on the local snowmobile club's website that show trails in Pittsburg as well as roads and access points to the lakes and rivers.

Deer Mountain Campground enables camping and picnicking on the Connecticut River.