37.2% live in Mississippi
7.0% live in Illinois
4.7% live in West Virginia, Michigan, Tennessee, Louisiana, Missouri, Washington and California
If you don't like people
with the name river
you should probably go to
New Hampshire (None live there).
Interesting fact: Mississippi
is the state with the most
first name river per capita.
Check out the popularity
of the first name river
for each state in the map below.