

The city was one of the United States' first boomtowns, initially due to the fertile Genesee River Valley, which gave rise to numerous flour mills, and then as a manufacturing center, which spurred further rapid population growth. Located in Western New York, the city of Rochester forms the core of a larger metropolitan area with a population of 1 million people, across six counties. state of New York, the seat of Monroe County, and the fourth-most populous in the state after New York City, Buffalo, and Yonkers, with a population of 211,328 as enumerated in the 2020 United States census.

Rochester ( / ˈ r ɒ tʃ ɛ s t ər, - ɪ s-/) is a city in the U.S.
