Apropos of a conversation about throwing out old photos from high school and college, I mentioned to my wife a measure of how geography-obsessed I am. If I cannot remember what town someone in college is from, it is a strong indicator I did not know them well, and this goes double for females. Yet there was a cultural difference it took a year or more to adjust to - the difference between defining by town and defining by county. A girl might be listed as from some interesting-sounding town, but if one struck up a conversation about it, she might look puzzled. "I'm from Nelson County." I learned that this is more common across the south, and I think parts of the midwest.
In New Hampshire, people go all through school and graduate without knowing what county they live in. Houses of Correction, probate (now circuit) courts, sheriffs, and public nursing homes are county items, and what you use to get people to identify their county. Fill in the blank with the first thing that comes to mind: _______House of Correction. That's actually a fair bit of government, but no one thinks that way in NH, except maybe the police and lawyers.