Dated articles, but instructive nonetheless. I doubt 2016 will have seen much improvement.
New data released by the U.S. Census bureau showed that in terms of domestic migration -- people moving about within the United States -- Illinois saw roughly 105,200 more people leave than arrive.
Even when offset by a gain of more than 37,600 by way of international migration, Illinois still ended up about 67,500 in the negative column.
With natural growth (births minus deaths) counted, Illinois showed a net population loss of nearly 22,200 people, or about 0.17 percent of its population.
Of the 50 states, Illinois was the top population loser. Other states showing a net loss of population were Connecticut (-3,876); Maine (-928); Mississippi (-1,110); New Mexico, (-458); Vermont, (-725) and West Virginia (-4,623).
In terms of domestic migration, the only state besides Illinois to show a six-figure loss was New York at nearly 158,000. The Empire State, however, showed a net population increase thanks to natural growth and international migration.
Related article found here.