[ataDude]

Uh, Governor, sheriffs are county officials in Texas, not cities. There may be a few that also cover incorporated cities by a mutual agreement, but not many.

[T-Bone Texan]

You just reminded me: There are no unincorporated areas in the county of San Francisco. The county and city of San Francisco share the exact same boundaries and area on the map.

I assumed that urban areas back east did the same thing.