I always thought that it was very young and in the teenage years, but I've seen a lot of period shows/documentaries where that doesn't seem to be the case.
hi! could you specify which country/region you're asking about? thx!
In the countries of northwest Europe (England, France, etc.) in the 1600s it was common for women to marry in their mid twenties. This might seem later than one would think, but in northwest Europe marriage necessitated the creation of a separate household. Thus, couples had to wait until they had saved enough money to establish themselves and their household before they married and had children. Also, 1/6 of women during this period never married during their fertile years.
During the same period, the 17th century, patterns in southern and eastern Europe were somewhat different. Here the stereotype holds true: most women were married by 20 years old. Families would all live together in complex, multi-generational households, and it was common for a man to not become patriarch until his mid-forties. Newly married couples would simply join the existing household.
R.A Houston. "Colonies, Enterprises, and Wealth" in Early Modern Europe: An Oxford History (Euan Cameron ed.)
P.S. Idk why the article doesn't mention the age that men married, but one can assume that it would have been the same age as women in these cases or perhaps older, especially if it was a second marriage.