Antrim sits in the Monadnock Region of Hillsborough County along the Contoocook River, with a small downtown built around former mill buildings. The town's rural surroundings and river valley setting give it a classic Monadnock Region character.

The Contoocook River powers a series of falls through downtown Antrim, and the surrounding hills offer hiking and access to nearby Willard Pond, a protected wildlife sanctuary. The town's modest commercial center serves basic local needs.

Housing in Antrim remains affordable relative to Peterborough or Hancock, drawing families and value-seekers who want Monadnock Region character at a lower cost. The town continues to work through the economic transitions common to former mill communities.