Source: US. Bureau of the Census
All observations are July 1 estimates of each year.
This series is calculated by FRB-St. Louis using data series from the Census Bureau. The FRB-St. Louis District includes all of Arkansas and portions of six other states: Missouri, Mississippi, Tennessee, Kentucky, Indiana and Illinois.
US. Bureau of the Census, Resident Population for all Illinois counties in FRB-St. Louis District [DILPOP], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/DILPOP, July 29, 2016.