Olio Twp Office 309 N Liberty St Eureka, IL 61530 Phone : (309) 467-4411 Business Category Government Offices-City Village & Twp Legislative Bodies Olio Township Of--township Hall 309 N Liberty St Eureka, IL 61530 Phone : (309) 467-4411 Business Category Government Offices-City Village & Twp Government Offices State & Local Government Offices & Public Schools