Rochester is a home rule-class city in Butler County, Kentucky, United States, at the confluence of the Green and Mud rivers.

[3] The population was 114 as of the 2020 Census[4] Rochester is rooted in an early pioneer settlement known as "The Mouth" for its strategic location at the confluence of the Green and Mud rivers.

[3] In the early 19th century, an early settler named Thomas Riddick platted a town at this location known as "Suffolk" on his father's Revolutionary War land grant, though the town was not successful.

Kentucky Route 70 (Rochester Road) passes through the city, leading east 14 miles (23 km) to Morgantown, the Butler County seat, and west 10 miles (16 km) to Drakesboro.

About 9.0% of families and 8.7% of the population were below the poverty line, including none of those under the age of eighteen and 13.3% of those 65 or over.