Sales and Use Tax Rate Change effective October 1, 2026 Ohio Department of Taxation sent this bulletin at 07/31/2026 08:00 AM EDT Sales and Use Tax Rate Change effective October 1, 2026 The sales and use tax rate for Warren County (83) will increase from 6.75 % to 7.25% effective October 1, 2026. Questions For questions about sales and use tax, you can: Visit www.tax.ohio.gov. Call 888-405-4039 for assistance.