Ranking of New York Counties By Percentage of Population Aged 25 years and above with an Educational attainment of Less than High School Diploma 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 Less than High School Diploma was 12.57%. Among all New York counties, Bronx County had the highest percentage of its population (aged 25 years and above) with an educational attainment of Less than High School Diploma (25.87%), followed by Hamilton County (20.30%), and Queens County (17.30%).
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 Less than High School Diploma in 2021
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| Rank | County | Percentage of Population (Aged 25yrs+) (%) |
|---|---|---|
| 1 | Bronx County | 25.87 |
| 2 | Hamilton County | 20.30 |
| 3 | Queens County | 17.30 |
| 4 | Kings County | 16.30 |
| 5 | Seneca County | 15.25 |
| 6 | Yates County | 13.81 |
| 7 | Sullivan County | 13.37 |
| 8 | Orleans County | 13.01 |
| 9 | Fulton County | 12.69 |
| 10 | Clinton County | 12.45 |
| 11 | Greene County | 12.07 |
| 12 | Cayuga County | 11.92 |
| 13 | Franklin County | 11.86 |
| 14 | New York County | 11.62 |
| 15 | Wyoming County | 11.59 |
| 16 | Richmond County | 11.40 |
| 16 | St. Lawrence County | 11.40 |
| 17 | Montgomery County | 11.35 |
| 18 | Washington County | 11.33 |
| 19 | Chenango County | 11.20 |
| 20 | Oneida County | 11.19 |
| 21 | Westchester County | 11.15 |
| 22 | Rockland County | 11.14 |
| 23 | Chautauqua County | 10.68 |
| 24 | Chemung County | 10.54 |
| 25 | Cattaraugus County | 10.40 |
| 26 | Oswego County | 10.27 |
| 27 | Orange County | 10.08 |
| 28 | Delaware County | 9.94 |
| 29 | Cortland County | 9.93 |
| 30 | Wayne County | 9.66 |
| 31 | Suffolk County | 9.61 |
| 32 | Broome County | 9.42 |
| 33 | Schoharie County | 9.38 |
| 34 | Schuyler County | 9.18 |
| 35 | Herkimer County | 9.13 |
| 36 | Allegany County | 9.00 |
| 37 | Monroe County | 8.91 |
| 38 | Lewis County | 8.86 |
| 39 | Essex County | 8.85 |
| 40 | Jefferson County | 8.83 |
| 41 | Columbia County | 8.78 |
| 42 | Onondaga County | 8.68 |
| 43 | Schenectady County | 8.67 |
| 44 | Ulster County | 8.58 |
| 45 | Warren County | 8.49 |
| 46 | Steuben County | 8.48 |
| 47 | Dutchess County | 8.47 |
| 48 | Niagara County | 8.37 |
| 49 | Nassau County | 8.30 |
| 50 | Livingston County | 8.14 |
| 51 | Erie County | 7.90 |
| 52 | Rensselaer County | 7.72 |
| 53 | Genesee County | 7.40 |
| 54 | Tioga County | 7.30 |
| 55 | Madison County | 7.24 |
| 56 | Albany County | 7.19 |
| 57 | Otsego County | 7.17 |
| 58 | Ontario County | 6.74 |
| 59 | Putnam County | 6.67 |
| 60 | Saratoga County | 6.29 |
| 61 | Tompkins County | 5.04 |