This report examines changes in the likelihood, timing and stability of marriage among adults ages 25 to 59. The analysis utilizes the public use micro samples of the 1950 to 2000 Decennial Censuses and the companion 2008 American Community Survey (ACS). The 2008 ACS was the first Census Bureau enumeration to inquire if the respondent had divorced within the past year, facilitating detailed tallies of the likelihood of divorce among adults in first marriages. The 2008 ACS was also the first survey since the 1980 Census to inquire as to the number of times the respondent had married. In a reversal of long-standing marital patterns, college-educated young adults are now slightly more likely than young adults lacking a bachelor’s degree to have married by the age of 30. Among the possible explanations for this shift are the declining economic fortunes of young men without a college degree and their increasing tendency to cohabit with a partner rather than marry. (Author abstract)