Just looked into a study about the richest counties across America and some findings are pretty wild. So the data comes from 2021 Census data, and it basically maps out median household income by county in every state. The range is massive - the wealthiest county has more than double the income of the poorest on the list.

Virginia dominates with Loudoun County at the top nationally with a median household income around $156k. California's Santa Clara County (where San Jose is) comes in second at $140k. Maryland's Howard County hits $129k, and Colorado's Douglas County is around $127k. New York's Nassau County is also up there at $126k. It's interesting because some of these richest counties are major metro areas, but others are smaller places you wouldn't expect.

The breakdown shows Virginia actually has the most richest counties overall - like 18 of the top 100 wealthiest counties in the entire country are in Virginia. California follows with 11, Maryland has 10, New Jersey 9. Then New York and Texas tie at 6 each. For context, the national median household income back in 2021 was around $70k, so these richest counties are significantly above that.

What's interesting is how varied these places are geographically. Some are surrounded by water, others by mountains or desert. Some aren't even technically counties - Louisiana has parishes instead, and Alaska has census areas. The populations range wildly too, from counties with over a million people down to just a few thousand. So yeah, wealth distribution in the US is pretty concentrated in specific regions.