21.2% live in Illinois
12.1% live in Colorado
7.6% live in Oklahoma, Texas, Missouri, South Dakota and California
If you don't like people
with the name exon
you should probably go to
New Hampshire (None live there).
Cool fact: South Dakota
is the state with the most
last name exon per capita.
Check out the popularity
of the last name exon
for each state in the map below.