Rochester is a city in Monroe County, New York, south of Lake Ontario in the United States. The Rochester metropolitan area is the second largest regional economy in New York State according to the U.S. Internal Revenue Service, after the New York City metropolitan area. Known as The World's Image Centre, it was also once known as The Flour City, and more recently as The Flower City. It is the county seat for Monroe County.Rochester's city population according to the 2010 census is approximately 210,565, making it New York's third most populous city after New York City and Buffalo. It is at the center of a larger Metropolitan Area which encompasses and extends beyond Monroe County and includes Genesee County, Livingston County, Ontario County, Orleans County and Wayne County. This area, which is part of the Western New York region, had a population of 1,037,831 people at the time of the 2000 Census. As of April 1, 2010, the 2010 Census indicated that this population rose to 1,054,322.

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