Dorothy Whitfield Historic Society, Inc: Maintains the historic Hyland House, 84 Boston Street
Dudley Farm Foundation: Maintains the Dudley Farm, 2351 Durham Road
Faulkner’s Light Brigade: Maintains Faulkner’s Island, about a mile and half offshore, 41 12 43 N, 72 39 15 W
Guilford Agricultural Society: Sponsors the Guilford Fair
Guilford Keeping Society: Maintains the Thomas Griswold House Museum, 171 Boston Street and Medad Stone Taver, 197 Three Mile Course
Guilford Land Conservation Trust: Maintains extensive trails and natural places
Guilford Preservation Alliance: Preserves and protects the built and natural heritage of the town
Shoreline Greenway Trail: Building a 25-mile continuous trail from Lighthouse Point, New Haven to Hammonasset Beach, Madison
