The Family Research Council is a Christian organization promoting the traditional family unit and the Judeo-Christian value system. Press contacts are J.P. Duffy or Alice Chao.

The Alliance for Marriage has pushed for a constitutional amendment banning same-sex marriages nationwide.

The Alliance Defense Fund opposes same-sex marriage and efforts to circumvent DOMA.

The United for Marriage Coalition is an umbrella group advocating for marriage rights for gays and lesbians. Faith groups (and nontheist organizations) are among the group’s members.

Lambda Legal works to achieve full recognition of rights, including marriage, for LGBT people.

The New York City-based organization Freedom to Marry is working to obtain same-sex marriage rights nationwide and to overturn the federal Defense of Marriage Act. Evan Wolfson is president.

The American Bar Association is the one of the largest voluntary professional membership organizations in the world.

The American Academy of Pediatrics is an organization of 60,000 pediatricians committed to the optimal physical, mental, and social health and well-being for all infants, children, adolescents, and young adults.

ReligiousTolerance.org posts a collection of polls. The most recent are at the bottom of the site.