Dayton is a city in Campbell County, Kentucky, United States, along a bend of the Ohio River. The population was 5,966 at the 2000 census. It is less than 2 miles (3.2 km) from downtown Cincinnati, Ohio.
Dayton is located at 39°6′42″N 84°28′13″W / 39.11167°N 84.47028°W / 39.11167; -84.47028 (39.111781, -84.470401).
According to the United States Census Bureau, the city has a total area of 1.7 square miles (4.3& km²), of which, 1.3 square miles (3.4 km²) of it is land and 0.3 square miles (0.9 km²) of it (20.48%) is water. Dayton is located within Kentucky's Outer Bluegrass region in the Upper South of the United States of America.