List of counties in New York

There are sixty-two in the State of. Five of these are s of and do not have functioning county s, except for a few borough officials. encompasses five counties, and is the county seat of all five of them:,  ,  ,  , and. Because each borough has a separate main post office (and Queens has four), the county seats of the five boroughs are often stated in terms of those main post offices: New York (Manhattan), Brooklyn, Bronx, Staten Island, and Jamaica (Queens), NY. However, the communities served by those main post offices are all within the city limits of New York. In contrast to other counties of New York state, the powers of the five boroughs of New York City are very limited, and in nearly all respects subordinate to the city's.

List of New York counties
The (FIPS) code, which is used by the United States government to uniquely identify counties, is provided with each entry. The FIPS code for each county links to census data for that county.

Defunct counties

 * formed from 11,170 square miles (28,930 km²) of land from Albany County on, , but renamed and partitioned. See.
 * Created on, from 25,100 square miles (65,000 km²) of un-organized land to cover the Duke of York's land grant in present day . On , , 24,900 square miles (64,500 km²) were lost to  because of a boundary dispute. The remainder of the land was lost in the Autumn of 1675 to the  Indians as a result of a war. The original grant was recreated on , , for the same reasons. The entire grant was transferred to  because of the expansion of the  in the Spring of 1687. The entire grant covers what today are Aroostook, Piscataquis, Penobscot, Hancock, Washington, Waldo, Knox, Lincoln, Kennebec, and Somerset counties.
 * formed on, from 1,910 square miles (4,950 km²) of Albany County land. Cumberland was disestablished on , , with the land returned to Albany County. Cumberland County was reinstated on , , this time with 2050 sqmi of land from Albany County. An additional 210 sqmi of land - this time from partitioned from Albany and Charlotte Counties, with some of it passed on to Gloucester County. On April 1, 1775, 10 square miles (26 km²) of land was exchanged between Cumberland, Albany and Charlotte counties. On , , Cumberland County was extinguished due to the partitioning of Vermont from  and . The Cumberland lands produced Windham, Bennington, Rutland, Windsor, and parts of Addison and Orange counties in . On , , New York attempted to adjust the border between itself and Vermont at the location where Cumberland County had previously existed, but to no effect.
 * formed on, as one of the original 12 counties. Created to cover the 1674 grant of the , , and  islands to the Duke of York. Transferred to  on , , where it was divided into , which consists of Martha's Vineyard and the Elizabeth Islands, and.
 * formed on, from 1540 sqmi of land from Albany County. 3390 sqmi of additional land was transferred from , with some of the original transfer returned to Charlotte on , . Gloucester County, New York became all or most of Orange, Essex, Caledonia, Orleans, Lamoile and Washington Counties in Vermont on ,.
 * formed on, from indefinite amounts of land to the west of Albany County and renamed Montgomery County on , . On , , a western border was established as a result of the partitioning of the counto to create Ontario County. This resulted in Montgomery County having a total of 21400 sqmi within its borders. On , , Montgomery County was again partitioned, this time to create Herkimer, Otsego and Tioga counties. This reduced Montgomery to 1080 sqmi of land. As a result of an adjustment to the Montgomery-Herkimer border due to improved cartography, 3730 sqmi of land passed from Herkimer to Montgomery, resulting in Montgomery having a total of 4810 sqmi of land on , . On , , Montgomery was partitioned again, this time with 1870 sqmi of land passing to Clinton, Essex, Saratoga, and Washington Counties, resulting in Montgomery only having 2940 sqmi of land. On , , Montgomery was again partitioned for the creation of Hamilton County, producing a Montgomery County of only 1110 sqmi of land. However, since Hamilton County was not properly organized, it remained a dependency of Montgomery County. On , , Montgomery County was again partitioned, this time passing 150 sqmi of land to Herkimer County. On , , Hamilton County was finally organized sufficient to govern itself, and so it was detached from Montgomery. The final partition of Montgomery County took place on , , with 560 sqmi of land going for the creation of Fulton County. This resulted in a Montgomery County of 400 sqmi of land.
 * original English county, partitioned in 1683 into Kings, Queens (including modern Nassau), Suffolk, Richmond and Westchester (including modern Bronx) counties.

Proposed new counties

 * to be formed out of part of Essex and Franklin Counties.
 * to be formed out of part of Suffolk County.