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Monroe County, New York

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Monroe County, New York
MonroeCountyOfficeBuilding — CC BY-SA 3.0, DanielPenfield · source

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About Monroe County

Monroe County is a county in the U.S. state of New York, located along Lake Ontario's southern shore. As of 2025, the population was 750,506, 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 upstate Rochester, NY Metropolitan Statistical Area. The county is part of the Finger Lakes region of the state.

Description adapted from Wikipedia, CC BY-SA 4.0.

Facts

Monroe County at a glance

County seat
Rochester
Population
759,443 (2020)
Land area
1,366 sq mi
Founded
1821

Communities

Largest communities in Monroe County

  1. Rochester County seat211,328
  2. Greece96,926
  3. Irondequoit51,043
  4. Perinton47,479
  5. Henrietta47,096

Background

History of Monroe County

When counties were established in the province of New York in 1683, the present Monroe County was part of Albany County. This was an enormous county, including the northern part of the State of New York as well as all of the present State of Vermont and, in theory, extending westward to the Pacific Ocean. This county was reduced in size on July 3, 1766, by the creation of Cumberland County, and further on March 16, 1770, by the creation of Gloucester County, both containing territory now in Vermont. On March 12, 1772, what was left of Albany County was split into three parts, one remaining under the name Albany County. One of the other pieces, Tryon County, contained the western portion (and thus, since no western boundary was specified, theoretically still extended west to the Pacific).

Adapted from Wikipedia, CC BY-SA 4.0.

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Official channels

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