Okla. Stat. tit. 19, § 681

The county treasurer is hereby designated and made the official depository for all moneys, funds, rentals, penalties, costs, proceeds of sale of property, fees, fines, forfeitures and public charges of every kind that may be received by any county officer, county board, county commission, or by any employee of either of such officers, boards or commissions by virtue or under color of office; and the said county treasurer shall be responsible on his official bond for the faithful performance of duty as such official depository.