Rochester is a city in and the county seat of Monroe County, New York, United States. It is the fourth-most populous city in New York, with a population of 206,108 as of the 2025 Census estimate. The Rochester metropolitan area in Western New York has an estimated 1.05 million residents and is the 54th-largest metropolitan area in the U.S. Throughout its history, Rochester has acquired several nicknames based on local industries; it has been known as "the Flour City" and "the Flower City" for its dual role in flour production and floriculture, and as the "World's Image Center" for its association with film, optics, and photography.