How many hot dog carts are there in New York City?

As of my last knowledge update in September 2021, it was estimated that there were approximately 2,850 active hot dog carts permitted by the New York City Department of Health and Mental Hygiene. However, this number may have changed since then as these permits are occasionally revoked or new ones granted. For the most up-to-date information, I recommend checking the official NYC Department of Health and Mental Hygiene website or another reliable source.