| | Population Estimates Base, April 1, 2000 | Population Estimate, July 1, 2009 | Numeric Population Change, April 1, 2000 to July 1, 2009 | Percent Population Change, April 1, 2000 to July 1, 2009 |
|
| United States | 281,424,602 | 307,006,550 | 25,581,948 | 9.1% |
| Appalachian Region | 23,642,949 | 24,993,391 | 1,350,442 | 5.7% |
| New York | 18,976,811 | 19,541,453 | 564,642 | 3.0% |
| Appalachian New York | 1,072,784 | 1,049,686 | -23,098 | -2.2% |
|
| County |
| Allegany | 49,927 | 49,157 | -770 | -1.5% |
| Broome | 200,536 | 194,630 | -5,906 | -2.9% |
| Cattaraugus | 83,955 | 79,689 | -4,266 | -5.1% |
| Chautauqua | 139,747 | 133,503 | -6,244 | -4.5% |
| Chemung | 91,072 | 88,331 | -2,741 | -3.0% |
| Chenango | 51,398 | 50,620 | -778 | -1.5% |
| Cortland | 48,599 | 47,996 | -603 | -1.2% |
| Delaware | 48,057 | 45,514 | -2,543 | -5.3% |
| Otsego | 61,672 | 61,602 | -70 | -0.1% |
| Schoharie | 31,582 | 31,529 | -53 | -0.2% |
| Schuyler | 19,222 | 18,720 | -502 | -2.6% |
| Steuben | 98,728 | 96,552 | -2,176 | -2.2% |
| Tioga | 51,787 | 50,064 | -1,723 | -3.3% |
| Tompkins | 96,502 | 101,779 | 5,277 | 5.5% |
