The age at marriage has undergone remarkable changes in the U.S. during the last 2 decades. These changes include the sharp decline in age at marriage during the decade 1940-1950, a slight continuation of this trend in 1950-1960, and significant changes in marriage patterns for subgroups of the population during both decades. Among urban, rural farm, and rural non-farm groups, the urban showed the fastest decline in age at marriage (1940-1960) and approached the original low level of the rural non-farm population. This decline was due entirely to the decline in the white population. Nonwhite males showed no trend, while nonwhite females showed a rise in the age of marriage. This reversed the traditional pattern of racial differential age at marriage. The geographic variation reveals no substantial difference in pattern of marriage age.