In the nine-county Chicago area, 11,241 homes sold during the month, down 1.2 percent from 11,374 sold in June last year.
In each of the previous five months this year, sales fell at least 6 percent in the Chicago area. The worst month was May, down 11 percent.
Chicago-area median prices rose 7 percent year-over-year.
Chicago-area sales actually rose 10 percent when factoring out distressed homes, according to supplemental information released by Midwest Real Estate Data LLC.
In the nine-county area, traditional sales were up 10 percent in June, to 8,801 compared with 7,998 the year before, according to the MRED report.
Foreclosure sales were down 9.6 percent, to 1,892, in June in the Chicago area, according to MRED. Short sales fell 44 percent, to 630.