Well, all the unhitched women around here--there's not many, but some--in the Sandhills, they're generally pretty close to six feet, like 5'10".
I'm 6'3", and recall how when I lived in Pennsylvania and New Jersey, it seemed as if I towered over most people there. Here, I'm a little bit taller than usual, but not enough that I stand out.
I read on freerepublic once that Dutch and Danish males are the tallest in Europe; there aren't hardly any of Dutch derivation in Nebraska, but those of Danish derivation are one of the three major ethnic groups here.
Somewhere else on the internet (sorry, no link, because if I saved every link pointing to useful and valuable information, I wouldn't have any "free space" on the hard-drive), I read that South Dakotans tend to be microscopically-taller than Nebraskans.