About Hamilton, Ohio. Located on the Great Miami River in the heart of the Cincinnati-Dayton metroplex, Hamilton is a historically-significant city with approximately 63,000 residents. Home to Miami University Hamilton and the County Seat of Butler County, Hamilton is the area center for government, finance and industry. Known for its unparalleled art, cultural & recreational activities, Hamilton is continually expanding its quality of life offerings. An award winning community, Hamilton was the recipient of the 2010 & 2015 Berkeley Springs International Water Tasting "Best Water in the World" award, the winner of the 2012 "Best of the Best" award by the Ohio Section of the American Water Works Association, the prestigious 2010 Public Gas System Achievement Award and five consecutive Reliable Public Power Provider (RP3) Platinum level awards. Additionally, the Hamilton City School District was named The National School District of Character for 2012. For more information, please visit www.hamilton-city.org.