Commack (/KO-mack/ or /KOM-mack/, KOM-mack is the original pronunciation an used by long time inhabitants of the area; KO-mack is used by the majority of population who have, or whose families have, moved into the area since the 1950s) is a hamlet and census-designated place (CDP) in Suffolk County, New York, United States. The population was 36,367 at the 2000 census.