William Frey, a senior demographer at the Brookings Institution, analyzed the census data showing that for the first time fewer than half of American households are headed by married couples.

June Carbone, a law professor at the University of Missouri-Kansas City, is co-author of Red Families v. Blue Families: Legal Polarization and the Creation of Culture (2010). She has commented on demographic data involving marriage and families.

The National Healthy Marriage Resource Center is a clearinghouse for high-quality, balanced and timely information and resources on healthy marriage. The organization’s mission is to be a first stop for information, resources and training on healthy marriage for experts, researchers, policymakers, media, marriage educators, couples and individuals, program providers and others.

The U.S. Census Bureau provides a summary page on marital status and living arrangements.

The Marriage & Religion Research Institute archives data about marriage from a number of sources. It also posts links to scholars around the country.

See the Centers for Disease Control and Prevention’s summary page on marriage and divorce.

ReligiousTolerance.org provides a summary page on marriage. The page includes links to information on different types of marriage, polygamy, same-sex marriage and divorce and remarriage.

The National Conference of State Legislatures’ website includes a summary page on marriage.

Twenty-seven bills involving marriage and family status were pending in Congress in June 2013. Track the status of these bills at Govtrack.us.