Seacoast Friends of NRA
- Service organization supports firearms safety and education, wildlife conservation, and shooting facilities programs.
- http://www.sfnra.com/

Partnership for Effective Nonprofits
- Initiative of area charitable organizations that coordinates resources to increase each group's effectiveness.
- http://www.partnershipforeffectivenonprofits.org/

Sexual Assault Support Services - SASS
- Dedicated to helping victims and survivors of sexual assault or abuse, and to preventing the occurrence of sexual violence in local communities. Offers 24-hour crisis hotline. Offices in Portsmouth and Rochester.
- http://www.sassnh.org/

Portsmouth Marine Society
- Non-profit educational publishing house dedicated to documenting the history of the Piscataqua River Basin region. Includes book descriptions and ordering information.
- http://www.portsmouthmarinesociety.org/

New Hampshire Seacoast NOW
- Local chapter of the National Organization for Women. Lists events calendar, action alerts, and membership information.
- http://www.seacoastnow.org/