Net County-to-County Migration Flow (5-year estimate) for Brown County, IL was 104.00000 Persons in January of 2020, according to the United States Federal Reserve. Historically, Net County-to-County Migration Flow (5-year estimate) for Brown County, IL reached a record high of 1160.00000 in January of 2009 and a record low of 104.00000 in January of 2020. Trading Economics provides the current actual value, an historical data chart and related indicators for Net County-to-County Migration Flow (5-year estimate) for Brown County, IL - last updated from the United States Federal Reserve on May of 2024.