Ranking of New York Counties By Percentage of Population Aged 25 years and above with an Educational attainment of High School Graduate or Equivalent in 2021 (ACS-5Yrs)
Updated on September 3, 2025.
Based on the US Census ACS-5Yrs estimates, in 2021, the percentage of the population of New York (aged 25 years and above) who had an educational attainment of High School Graduate or Equivalent was 25.24%. Among all New York counties, Lewis County had the highest percentage of its population (aged 25 years and above) with an educational attainment of High School Graduate or Equivalent (43.33%), followed by Chenango County (41.16%), and Orleans County (40.60%).
The chart below shows the top 10 New York counties, and the table below shows the ranking of all New York counties.
You can see similar information for other educational attainments.
You can also see similar information for other states and for the United States.
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Related Topics: New York ACS-5Yrs Estimates, 2021 Topic List.
Data Source: US Census - ACS 5-Year Estimates.
Ranking of New York Counties By Percentage of Population (Aged 25yrs+) with an Educational Attainment of High School Graduate or Equivalent in 2021
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| Rank | County | Percentage of Population (Aged 25yrs+) (%) |
|---|---|---|
| 1 | Lewis County | 43.33 |
| 2 | Chenango County | 41.16 |
| 3 | Orleans County | 40.60 |
| 4 | Cattaraugus County | 39.75 |
| 5 | Delaware County | 39.53 |
| 6 | Washington County | 39.01 |
| 7 | Genesee County | 38.40 |
| 8 | Franklin County | 37.83 |
| 9 | Wyoming County | 37.79 |
| 10 | Oswego County | 37.26 |
| 11 | Greene County | 36.87 |
| 12 | Fulton County | 36.84 |
| 13 | Schoharie County | 36.37 |
| 14 | Herkimer County | 35.84 |
| 15 | Tioga County | 35.80 |
| 16 | Montgomery County | 35.63 |
| 16 | St. Lawrence County | 35.63 |
| 17 | Madison County | 35.32 |
| 18 | Allegany County | 35.24 |
| 19 | Clinton County | 35.22 |
| 20 | Steuben County | 35.01 |
| 21 | Schuyler County | 34.97 |
| 22 | Chautauqua County | 34.59 |
| 23 | Yates County | 34.40 |
| 24 | Chemung County | 34.31 |
| 25 | Essex County | 33.57 |
| 26 | Seneca County | 33.32 |
| 27 | Wayne County | 32.52 |
| 28 | Jefferson County | 32.46 |
| 29 | Sullivan County | 32.37 |
| 30 | Cayuga County | 32.29 |
| 31 | Otsego County | 32.23 |
| 32 | Niagara County | 31.76 |
| 33 | Oneida County | 30.82 |
| 34 | Livingston County | 30.73 |
| 35 | Cortland County | 30.65 |
| 36 | Broome County | 30.56 |
| 37 | Richmond County | 29.88 |
| 38 | Columbia County | 29.45 |
| 39 | Orange County | 28.57 |
| 40 | Ulster County | 28.25 |
| 41 | Warren County | 28.11 |
| 42 | Bronx County | 27.86 |
| 43 | Rensselaer County | 27.32 |
| 44 | Schenectady County | 27.08 |
| 45 | Hamilton County | 26.95 |
| 46 | Queens County | 26.69 |
| 47 | Putnam County | 26.36 |
| 48 | Dutchess County | 26.25 |
| 48 | Erie County | 26.25 |
| 49 | Suffolk County | 25.81 |
| 50 | Ontario County | 25.50 |
| 51 | Onondaga County | 25.44 |
| 52 | Kings County | 25.25 |
| 53 | Saratoga County | 24.02 |
| 54 | Monroe County | 23.05 |
| 55 | Rockland County | 22.12 |
| 56 | Nassau County | 21.80 |
| 57 | Albany County | 21.24 |
| 58 | Westchester County | 18.43 |
| 59 | Tompkins County | 17.45 |
| 60 | New York County | 12.24 |