Annawan Twp Office 306 Dhamers Ave Annawan, IL 61234 Phone : (309) 935-6351 Business Category Government Offices-City Village & Twp Legislative Bodies Annawan City Of--annawan Township Annawan, IL 61234 Phone : (309) 935-6351 Business Category Government Offices-City Village & Twp Government Offices State & Local Government Offices & Public Schools