Monroe County is a county in the U.S. state of New York, located along Lake Ontario's southern shore. As of 2022, the population was 752,035, according to Census Bureau estimates. Its county seat and largest city is Rochester. The county is named after James Monroe, the fifth president of the United States. Monroe County is part of the Rochester, NY Metropolitan Statistical Area. The county is part of the Finger Lakes region of the state.

Rochester is a city in the U.S. state of New York and the county seat of Monroe County. It is the fourth-most populous city and 10th most-populated municipality in New York, with a population of 211,328 at the 2020 census. The city forms the core of the larger Rochester metropolitan area in Western New York, with a population of over 1.09 million residents. 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 "Imaging Capital of the World" for its association with film and still photography.