Currently the average age at marriage in the US is 26.8 years for men, and 25.1 years for women. It is interesting that though this represents an increased age for men, it is not significantly higher than the rate 100 years ago. Actually age rates at marriage for men declined from 1910 through 1960.he largest jump in a decade was women’s average age at marriage in 1980 and 1990. In ten years the age rate jumped from 22 years to 23.9. In fact in the last 20 years, both men and women show a considerable increase in age at marriage.