Place List: O, sorted alphabetically (number of total localities in parentheses):
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1. Oneida County, New York (28)  2. Onondaga County, New York (32) 3. Ontario County, New York (15) |
4. Orange County, New York (7) 5. Orleans County, New York (9) 6. Oswego County, New York (14) |
7. Otsego County, New York (15) |
