Warren is a town in Knox County, settled in 1736 and incorporated on November 7, 1776 from a portion of St. Georges Plantation.

The Powder Mill Locks date from 1793 and supported a canal system allowing water transportation inland up the St. George River. Today that system has virtually disappeared, though one can understand the need for it, considering that the river is impassible at certain points without it. A portion is visible at Payson Park on Route 90.

Warren's South Pond and North Pond provide fine recreational opportunities. The village lies off the heavily traveled highways: U.S. Route 1 and Maine Routes 90, 131, and 235.

Warren is now the site of the new state prison for Maine.