I think Cabbage is has a really good point, however there are programs that recruit nationally to stay competitive.
Here is where players were from on my son's former program his Sr year; which is a perennially nationally ranked TX based D3. Even though they get about 1/3 of their players from TX, there were days without a single player from TX in the lineup his Sr year.
CA
Canada - Two provinces, BC and Ontario
CO
MT
Mexico City
NC
NV
OK
TX
WA