The most likely answer is that about 1.1 million people voted in New York City’s Democratic primary, based on 2025 turnout reporting. That figure appears in coverage of the citywide primary and is described as more than a third of registered Democrats.

What that means

  • One report says nearly 1.1 million ballots were cast in the 2025 New York City Primary Election.
  • Another report says CBS News estimated 1.1 million voters in the NYC Democratic primary.
  • Those numbers refer to the city primary , not a statewide New York Democratic primary.

If you meant statewide

The wording “New York” can also mean the whole state, but the results I found are for New York City’s Democratic primary rather than a statewide presidential primary.

Details

Item| Figure
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NYC 2025 Primary turnout| nearly 1.1 million 2
CBS News estimate for NYC Democratic primary| 1.1 million 3
Share of registered voters in NYC primary| 29.9% 2

TL;DR: In New York City’s Democratic primary, roughly 1.1 million people voted.