The rate remarkably dropped almost an entire percentage point from April's revised rate of 4.7 percent. The year-over-year jobs gain totaled 242,600, a 1.5 percent annual increase.
Nationally, the unemployment rate declined from 4.4 percent in April to 4.3 percent in May.
The U.S. earlier this month reported 4.3% unemployment, down from 4.4% month-over-month.
"Leisure and hospitality led job losses this month, down for the fourth straight month", Kelly said.
Kelly says trade and transportation added 2,400 jobs due to hiring in both retail and wholesale trade.
State labor statistics released Friday show that Madison, Stanton and Pierce Counties saw their unemployment rate hold at 2.5% in May.
The county's economy added 710 jobs over the previous year, growing to 17,470.
The largest drop in jobs occurred in the construction field, which shed 4,300 positions. "These jobs are expected to return later this year". But in 2016, data indicates that Anchorage's May employment rate was at 5.9 percent.
Zeller said the growth in government jobs in May was promising.
"Illinois remains -23,300 jobs short of reaching its prior peak employment reached in September 2000", Illinois Department of Employment Security Director Jeff Mays said.
The lowest rate was 2.7 percent in Cumberland County and the highest was 6.2 percent in Aroostook County. "They may be looking for a different job, but they haven't quit the one they already have".
Job-losing industries over the year were: information, down 10 to 240; and professional and business services, down 30 to 1,650.