I was very surprised too, but that's what the records showed. Of course the records that go on are well off Europeans and English and Irish, and the ones who were in Louisiana since it was French. I can't know anything about the rest. I did expect to find what we would consider child brides but no, way more were mid-20s. I was under the (apparently quite mistaken) impression that the past was more "marry young or be considered unfit". Didn't really note the ages of the guys, as I didn't have any preconceptions about that.
My own mom was 30 when she married, had 4 kids pretty quickly. Her mom married at 24. Her grandma, though, at 18. But on my dad's side it's 25, 27, 20, 22, 25, if I go up the patrilineal line. Which gets up back to the freaking 1700s, seems so long ago. But even back to the 1600s, one 16 year old & 2 who were 25.
I found that remarkable but more it seems likely that my perception was shaped by stories, and less likely that my dad's family was outliers.