That’s a map of highest elevation by county. I don’t think most people in LA County (third from bottom on the California coast) live above 6800 feet, because most people don’t live on mountains even if one exists in their county.
The map of average elevation by county looks similar, but you are right that this matters very little because people are disproportionally likely to live in low elevations.
Also, the mouth of the Mississippi basin does seem to be at a lower elevation than the West Coast:
That’s a map of highest elevation by county. I don’t think most people in LA County (third from bottom on the California coast) live above 6800 feet, because most people don’t live on mountains even if one exists in their county.
Oops, sorry.
The map of average elevation by county looks similar, but you are right that this matters very little because people are disproportionally likely to live in low elevations.