Warren Square is named for Dr. John Warren, the original owner of the towns of Hartland, St. Albans and Palmyra. Hartland was first known as Warren's Town #3.

The Hartland House, pictured on the left, was erected by Jacob Stafford, an early trader in town. In 1847, it was operated as a tavern by Mr. Joseph Brown. Over the years it went through many incarnations including tavern, hotel, boarding home for mill employes and apartment house.

In early days, a street ran behind the Hartland House alongside the Sebasticook River.