State of New Hampshire - Londonderry
- Part of the state's official site. Town's mailing address, population, county, and districts for election purposes. Includes related links.
- http://www.nh.gov/municipal/londonde.html

Town of Londonderry
- Official town website. Municipal departments and services, planning documents, community resources, and event calendar.
- http://www.londonderrynh.org/

Londonderry Trailways
- Non-profit group working to establish and maintain a pedestrian and recreational trail system in town. Includes maps, mission statement, officers, newsletter, current projects, and volunteer information.
- http://www.londonderrytrails.org/

Londonderry School District
- Calendars, announcements, policies, school board members and meeting agendas, phone directory, bus schedules, and related information.
- http://www.londonderry.org/