Conneaut is a city in Ashtabula County, Ohio, United States, along Lake Erie at the mouth of Conneaut Creek 66 miles (106 km) northeast of Cleveland. The population was 12,318 at the 2020 census. Conneaut is located at the far northeastern corner of the state, within the Cleveland metropolitan area.

Ashtabula County is the northeasternmost county in the U.S. state of Ohio. As of the 2020 census, the population was 97,574. The county seat is Jefferson, while its largest city is Ashtabula. The county was created in 1808 and later organized in 1811. The name Ashtabula derives from the Lenape language phrase ashte-pihële, which translates to 'always enough (fish) to go around, to be given away' and is a contraction of apchi ('always') + tepi ('enough') + hële. Ashtabula County is part of the Cleveland, OH Metropolitan Statistical Area.