Monroe County Information
Monroe County, NY was created in 1806 from Genesee County. The first Census which reported its residents was in 1810. The townships in Allegany's northern tier were all later ceded to other counties.
Additions and Changes in Townships:
Irondequoit formed from Brighton in 1839
Webster formed from Penfield, 1840
Hamlin (Union) formed from Clarkson in 1852