Covid19 cases: NYC v. Nassau County Posted by manohar kanuri | Sep 13, 2020 | Covid-19 | 0 | NYC population: 8.3 millionNassau County: 1.35 million (US Census estimate July 2019) Confirmed Covid19 cases, per 100,000 population. New York City: Confirmed cases per 100,000 population. Nassau County: Confirmed cases per 100,000 population. New York City and Nassau County: Confirmed cases per 100,000 population.