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
named river
you should probably move to
New Hampshire (None live there).
Cool 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.