Mason is…

the largest city in Warren County, which is near the southwest corner of Ohio. Warren County is “Ohio’s Largest Playground” and Mason is the anchor. Come to Mason and stay for the fun! Regional attractions include The Golf Center, Great Wolf Lodge and Conference Center, Kings Island amusement park, and the annual Western & Southern Open. Local attractions include the Mason Community Center and Mason Historical Society’s Alverta Green Museum. Residents and visitors look forward to the annual Red, Rhythm and Boom event, Mason Heritage Festival and Parade, Christmas in Mason activities and a wide variety of programs and classes for all ages at Mason Community Center.


The IRS announced the tax filing due date is Monday, May 17, 2021.

Let us help you with your taxes. In person tax preparation is not available at this time. For tax preparation assistance, please email your tax documents via the secure email. The City also offers an online tax tool to calculate your taxes or you can print completed forms and attach the appropriate documentation to send in to the Mason Municipal Center. 

Resident Online Tax Tool         Secure e-mail to contact the tax department.

Individual Tax Forms Business Tax Forms