This is somewhat a "people live in cities" graph, but not as stark of one I expected. Not all big cities are so educated, plus there are a lot of rural places that draw in a surprising number of people with advanced degrees.
Still, I'm amused that Interstate 29 in specific lights up like a string of Christmas lights.
Oklahoma only has 1 county lit up, and it's where a state university is, OSU. But it's ranked lower nationally than OU (#196 vs #132). Both are in otherwise small towns, basically overrun by their respective colleges. Anecdotally, Norman (OU) is known to have nothing in town, but Stillwater (OSU) has it's own subculture and town pride.
I'm curious how many of these counties just contain college towns vs how many actually might attract highly educated people.
I've spent most of my time in southern Colorado which is alright but central/northern is stunning...it's almost like if oregon or Washington were landlocked.