Butler is a city in Pendleton County, Kentucky, United States. The population was 613 at the 2000 census.
According to the United States Census Bureau, Butler has a total area of 0.2 square miles (0.6 km²), of which, 0.2 square miles (0.6 km²) of it is land and 4.17% is water.
The city of Butler was established around 1852 when the Kentucky Central Railroad was built through the area. The city was named for William O. Butler, U.S. congressman from the area (1839–43), when it was incorporated on February 1, 1868.