THE CENSUS HAS IDENTIFIED COUNTY POPULATIONS AND RANKINGS DETERMINED BY THE 2020 CENSUS. WINONA COUNTY'S 2020 POPULATION IS 49,671, RANKING 19TH LARGEST IN MINNESOTA. THE 2019 STATE OF MN WINONA COUNTY POPULATION ESTIMATE WAS 50,830 AND THE 2010 CENSUS POPULATION WAS 51,461.