| Rank |
County |
Population (2012) |
| 1 |
Kings County, New York
|
2,565,635
|
| 2 |
Queens County, New York
|
2,272,771
|
| 3 |
New York County, New York
|
1,619,090
|
| 4 |
Suffolk County, New York
|
1,499,273
|
| 5 |
Bronx County, New York
|
1,408,473
|
| 6 |
Nassau County, New York
|
1,349,233
|
| 7 |
Westchester County, New York
|
961,670
|
| 8 |
Erie County, New York
|
919,086
|
| 9 |
Monroe County, New York
|
747,813
|
| 10 |
Richmond County, New York
|
470,728
|
| 11 |
Onondaga County, New York
|
466,852
|
| 12 |
Orange County, New York
|
374,512
|
| 13 |
Rockland County, New York
|
317,757
|
| 14 |
Albany County, New York
|
305,455
|
| 15 |
Dutchess County, New York
|
297,322
|
| 16 |
Oneida County, New York
|
233,556
|
| 17 |
Saratoga County, New York
|
222,133
|
| 18 |
Niagara County, New York
|
215,124
|
| 19 |
Broome County, New York
|
198,060
|
| 20 |
Ulster County, New York
|
181,791
|
| 21 |
Rensselaer County, New York
|
159,835
|
| 22 |
Schenectady County, New York
|
155,124
|
| 23 |
Chautauqua County, New York
|
133,539
|
| 24 |
Oswego County, New York
|
121,700
|
| 25 |
Jefferson County, New York
|
120,262
|
| 26 |
St Lawrence County, New York
|
112,232
|
| 27 |
Ontario County, New York
|
108,519
|
| 28 |
Tompkins County, New York
|
102,554
|
| 29 |
Putnam County, New York
|
99,607
|
| 30 |
Steuben County, New York
|
99,063
|
| 31 |
Wayne County, New York
|
92,962
|
| 32 |
Chemung County, New York
|
88,911
|
| 33 |
Clinton County, New York
|
81,654
|
| 34 |
Cayuga County, New York
|
79,552
|
| 35 |
Cattaraugus County, New York
|
79,458
|
| 36 |
Sullivan County, New York
|
76,793
|
| 37 |
Madison County, New York
|
72,382
|
| 38 |
Warren County, New York
|
65,538
|
| 39 |
Livingston County, New York
|
64,810
|
| 40 |
Herkimer County, New York
|
64,508
|
| 41 |
Washington County, New York
|
62,934
|
| 42 |
Columbia County, New York
|
62,499
|
| 43 |
Otsego County, New York
|
61,709
|
| 44 |
Genesee County, New York
|
59,977
|
| 45 |
Fulton County, New York
|
54,925
|
| 46 |
Franklin County, New York
|
51,795
|
| 47 |
Tioga County, New York
|
50,478
|
| 48 |
Montgomery County, New York
|
49,941
|
| 49 |
Chenango County, New York
|
49,933
|
| 50 |
Cortland County, New York
|
49,474
|
| 51 |
Greene County, New York
|
48,673
|
| 52 |
Allegany County, New York
|
48,357
|
| 53 |
Delaware County, New York
|
47,276
|
| 54 |
Orleans County, New York
|
42,836
|
| 55 |
Wyoming County, New York
|
41,892
|
| 56 |
Essex County, New York
|
38,961
|
| 57 |
Seneca County, New York
|
35,305
|
| 58 |
Schoharie County, New York
|
32,099
|
| 59 |
Lewis County, New York
|
27,224
|
| 60 |
Yates County, New York
|
25,344
|
| 61 |
Schuyler County, New York
|
18,514
|
| 62 |
Hamilton County, New York
|
4,778
|