Brown County Treasurer 200 Court St # 2 Mount Sterling, IL 62353 Phone : (217) 773-3133 Business Category Public Finance Taxation & Monetary Policy Brown County Of--treasurers Office Mount Sterling, IL 62353 Phone : (217) 773-3133 Business Category Government Offices-County Government Offices & Public Schools Brown County Of--mt Sterling, Treasurers Office Courthouse Mount Sterling, IL 62353 Phone : (217) 773-3133 Business Category Government Offices-County Government Offices & Public Schools