The Illinois Department of Employment Security says the seasonally adjusted rate for April didn't change from the 5.1 percent reported in March.
Compared to April of 2005, last month's rate is down eight-tenths of a percentage point.
State officials say job growth in April was the largest since July of 2005.
Illinois added more than 23,000 jobs in April. And since February, employers have added 43-thousand-600 jobs. That's the largest three-month gain since 1999.