D.C. Has Lowest Marriage Rate In Nation, Largest Percentage of Same-Sex Couples - The Sexist - Washington City Paper:
"According to a recent Pew Research study, the District of Columbia has the lowest marriage rate in the country. Only 23 percent of women and 28 percent of men and in D.C. are married, compared to 48 and 52 percent nationwide. The rates in D.C. are so low that they lie entirely off the Pew map’s color key. The closest states to D.C.’s numbers are Rhode Island, where 43 percent of women are married, and Alaska, where 47 percent of men are married."