Madison Land Conservation Trust, Inc.
- Overview of organization plus information on membership.
- http://www.madisonlandtrust.org/

Griswold Airport
- Aeronautical information, including location, runways, taxiways, navaids, radio frequencies, FBO information, fuel prices, hotel and motel listings, hotels, weather, sunrise and sunset times, aerial photo and airport diagram.
- http://airnav.com/airport/N04

Friends of Hammonasset
- Volunteer organization working with State and local park management to provide environmental education, preserve the park's natural resources and raise public awareness.
- http://www.friendsofhammonasset.org/

Madison, Connecticut
- Community information including on municipal offices, Town calendar, employment and events.
- http://www.madisonct.org/

Shore Publishing Community Newspapers
- News from the Madison Source, Guilford Courier, Old Saybrook Harbor News, and the Branford Sound.
- http://www.shorepublishing.com/

Madison Community Guide
- Includes contact information for the municipality, Chamber of Commerce, Historical Society, and area attractions.
- http://www.madisonct.com/