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  • New York State Association of Counties
    540 Broadway, Fifth Floor
    Albany, NY 12207-0000
    Phone: (518)465-1473
    Fax: (518)465-0506
    http://www.nysac.org/

    County NACo
    Member
    2010
    Population
    Square
    Miles
    County Seat Board
    Size
    Founded
    Albany   304,204 523 Albany   39  1683 
    Allegany   48,946 1,029 Belmont   15  1806 
    Broome   200,600 706 Binghamton   15  1806 
    Cattaraugus 80,317 1,308 Little Valley   21  1808 
    Cayuga 80,026 692 Auburn   15  1799 
    Chautauqua   134,905 1,060 Mayville   19  1808 
    Chemung   88,830 407 Elmira   15  1836 
    Chenango   50,477 894 Norwich   23  1798 
    Clinton   82,128 1,038 Plattsburgh   10  1788 
    Columbia   63,096 635 Hudson   23  1786 
    Cortland   49,336 499 Cortland   19  1808 
    Delaware   47,980 1,442 Delhi   19  1797 
    Dutchess 297,488 796 Poughkeepsie   25  1683 
    Erie   919,040 1,043 Buffalo   11  1821 
    Essex 39,370 1,794 Elizabethtown   18  1799 
    Franklin   51,599 1,629 Malone   1808 
    Fulton   55,531 495 Johnstown   20  1838 
    Genesee 60,079 493 Batavia   1802 
    Greene   49,221 647 Catskill   14  1800 
    Hamilton 4,836 1,717 Lake Pleasant   1816 
    Herkimer 64,519 1,411 Herkimer   17  1791 
    Jefferson   116,229 1,269 Watertown   15  1805 
    Lewis   27,087 1,275 Lowville   10  1805 
    Livingston 65,393 632 Geneseo   17  1821 
    Madison 73,442 655 Wampsville   19  1806 
    Monroe 744,344 657 Rochester   29  1821 
    Montgomery   50,219 403 Fonda   1772 
    Nassau   1,339,532 285 Mineola   19  1899 
    New York City*   8,175,133 23 New York City   54  1683 
    Niagara   216,469 522 Lockport   15  1808 
    Oneida   234,878 1,212 Utica   23  1798 
    Onondaga   467,026 778 Syracuse   17  1794 
    Ontario   107,931 644 Canandaigua   21  1789 
    Orange 372,813 812 Goshen   21  1683 
    Orleans   42,883 391 Albion   1824 
    Oswego   122,109 952 Oswego   25  1816 
    Otsego   62,259 1,002 Cooperstown   14  1791 
    Putnam   99,710 230 Carmel   1812 
    Rensselaer 159,429 652 Troy   19  1791 
    Rockland 311,687 174 New City   17  1798 
    Saratoga   219,607 810 Ballston Spa   23  1791 
    Schenectady   154,727 205 Schenectady   15  1809 
    Schoharie 32,749 622 Schoharie   16  1795 
    Schuyler   18,343 328 Watkins Glen   1854 
    Seneca 35,251 324 Waterloo   14  1804 
    St. Lawrence   111,944 2,680 Canton   15  1802 
    Steuben 98,990 1,391 Bath   16  1796 
    Suffolk 1,493,350 912 Riverhead   19  1683 
    Sullivan 77,547 968 Monticello   1809 
    Tioga   51,125 519 Owego   1791 
    Tompkins   101,564 475 Ithaca   15  1817 
    Ulster 182,493 1,124 Kingston   23  1683 
    Warren   65,707 867 Queensbury   20  1813 
    Washington 63,216 831 Fort Edward   17  1772 
    Wayne   93,772 604 Lyons   15  1823 
    Westchester 949,113 431 White Plains   17  1683 
    Wyoming   42,155 593 Warsaw   16  1841 
    Yates   25,348 338 Penn Yan   14  1823 

      * Consolidated City-County Government