Vermont Indicators Online: Castleton
- Historical data and source information organized into various theme tables. Includes population, race, housing, transportation, education, property taxation, public safety and natural resources.
- http://maps.vcgi.org/indicators/cfhome/town_profile.cfm?Call_Program=INDICATORS&ProfileTown=Castleton

St. John the Baptist
- Provides mass schedule, photographs, contact information and link to the Roman Catholic Diocese bulletin board.
- http://www.vermontparishes.org/parishes/?church=21

Castleton Historical Society
- Established in 1947. Provides a short history and information on historical sites in the town.
- http://www.bsi-vt.com/castleton/chs/

Birdseye Mountain
- History and photographs for the "lost ski area" that operated for several years in the 1960's.
- http://www.nelsap.org/vt/birdseye.html