Ah yes, let's import those Democrat Mexicans as fast as possible.
#86 would not be too good; Virginia Beach (where I live) is like #30 or so. And we're half the size (pop.) of Fairfax county.
I don't think it makes too much sense to look at the actual city limits. Better look for the agglomeration. In the case of VB, that's the entire Hampton Roads, Tidewater, whatever you call it, area. Which would definitely qualify as "very large". I think Des Moines would probably move a few spots down i that comparison, not sure though. Anyways, it's not one of the 50,60 largest urban areas in America, so not very large.