PennPIRG: The Pennsylvania Public Interest Research Group
- Group affiliated with Ralph Nader which researches issues and lobbies for liberal solutions
- http://www.pennpirg.org/

Committee of Seventy
- Political watchdog group and nonpartisan research and election information source for the Philadelphia metropolitan area
- http://www.seventy.org/

Lehigh Valley Animal Rights Coalition
- Covers Pennsylvania animal rights issues, provides meeting dates, and offers a newsletter.
- http://www.enter.net/~pstacks/

Pennsylvania Family Institute
- Conservative Christian organization strengthening families by restoring to public life traditional and foundational principles and values
- http://www.pafamily.org/

Pennsylvania Association for Government Relations
- Organization for lobbyists in the Commonwealth of Pennsylvania. Guidelines, membership, newsletter and calendar.
- http://www.pagr.org/

Pennsylvania Coalition Against Rape
- Working to eliminate all forms of sexual violence and to advocate for the rights and needs of victims of sexual assault.
- http://www.pcar.org/

American Civil Liberties Union (ACLU) of Pennsylvania
- Leading organization in defense of civil liberties, regardless of political persuasion
- http://www.aclupa.org/

Pennsylvania Pro-Life Federation
- Statewide pro-life coalition opposed to abortion, infanticide, and euthanasia
- http://www.paprolife.org/