Gilsum, New Hampshire is a small town located in Cheshire County with a population of 813. People go to the city of Keene for shopping and services, which is just 12 minutes to the south. Chartered in 1763, Gilsum has a total area of 16.7 square miles, of which 16.66 square miles is land and 0.04 square miles is water. Gilsum Stone Arch Bridge is one of the popular attractions. Most of the students attend John D. Perkins Academy that is an A+ grade school for education.