Most of Clarksville was built recently: 8% of its homes predate 1940 and the median home dates from 1993. Below: maps from 1989 on and the census since 1840.
The area was originally known as "Dartmouth College Grant" and was part of a tract granted to Dartmouth College; sections were sold off by the college to raise money. It was purchased by Benjamin Clark of Boston and Joseph Murdock of Norwich, Vermont. The first census taken was in 1830, at which time there were 88 residents. It was incorporated in 1853, and renamed Clarksville in 1872 for the Clark family.
In the late 19th century, major industries included starch and maple sugar. Logging companies have been the primary employers in town for many years.
Founding dates: Wikidata, Wikipedia, the U.S. post office records of Blevins & Helbock (CC0) and the Census. Homes by year built: Census ACS 2020–24. National Register of Historic Places: National Park Service (list of May 22, 2026). Old photos, postcards and papers: Wikimedia Commons, the Library of Congress and other public archives, credited on each item’s page. Maps: U.S. Geological Survey historical topographic maps (via Esri) and Sanborn fire-insurance maps (Library of Congress). History text and census tables: Wikipedia (CC BY-SA 4.0). Places that used to be: USGS Geographic Names Information System (2021). How TownRatings grades history →
From Wikimedia Commons (8), Wikipedia, U.S. Geological Survey historical maps, U.S. Census counts (via Wikipedia), the US Post Offices dataset (Blevins & Helbock) and the USGS Geographic Names Information System. Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.