what county is elmont ny in
Elmont, New York. Homefacts City Report. Elmont is located in Nassau County, NY. The population is 37,426, making Elmont the 6th largest city in Nassau County. There are 5 public schools in Elmont with an average Homefacts rating of B. The total crime rate for Elmont is very low, and there are 12 registered sex offenders residing in the city.