You will receive your tax bill from the City of Marietta Tax Division in August (if you filed a tax return with the County). The taxes are payable at that time and become delinquent 60 days from the date bills are mailed, October 31. If you live in the City, you are on a dual taxing system; therefore, you will receive two separate bills-one from the City, the other from the County. For more information, please call the Tax Manager at 770-794-5680.