Ohio

Hamilton County is a county located in the southwestern corner of the U.S. state of Ohio. As of the 2010 census, the population was 802,374.[2] making it the third-most populous county in Ohio. The county seat and largest city is Cincinnati.[3] The county is named for the first Secretary of the Treasury, Alexander Hamilton.[4] Hamilton County is part of the Cincinnati-Middletown, OH-KY-IN Metropolitan Statistical Area. . .

Hamilton County historically elected Republican candidates in national elections, but has trended Democratic in recent years. In 2008, Barack Obama was the first Democratic presidential candidate to win the county since 1964. The county continued to lean Democratic, voting for Obama again in 2012 and for Democratic candidate Hillary Clinton in 2016. In fact, it was one of the few counties in Ohio to swing toward the Democrats in 2016 even as the state as a whole had swung toward the Republicans. In the 2018 midterm elections, with the election of Democrat Stephanie Summerow Dumas, the Hamilton County Board of Commissioners was completely under Democratic control for the first time ever.[23] They had previously regained a 2/3rds majority control of the Board of Commissioners in 2016 with the election of Denise Driehaus. In 2019, longtime Democratic Commissioner Todd Portune announced his resignation from the Board due to health problems. Portune's Chief of Staff, Victoria Parks, was appointed to serve the remainder of his term (through the November 2020 general election). With Parks' appointment, the Board of Commissioners became for the first time all-female and majority black.[20]

Due to its tight races and its position in the swing state of Ohio, Hamilton County is regarded as a crucial county to win in presidential elections. In 2012, The Washington Post named Hamilton as one of the seven most important counties in the country for that year's election.[24] Time characterized Hamilton County's political scene as "a battle between conservative suburbs and a Democratic urban center, though Cincinnati is one of the most conservative metro areas in the Midwest."

https://en.wikipedia.org/wiki/Hamilton_County,_Ohio