I typed "Orleans," but the way you wrote the answer requires you to type "parish" when you don't have to type "county" for any other answer. I'd specify "or county equivalent" in the caveats.
A few things, otherwise solid quiz: Only a small sliver of Birmingham sticks into Shelby county, the bulk of the city is in Jefferson, Hartford could be considered Hartford County or Capitol Planning Region, and Tucson should be spelled as such. Really fun idea, looking forward to sequels!