Essex County is a county in the U.S. state of New York. As of the 2020 census, the population was 37,381. Its county seat is the hamlet of Elizabethtown. Its name is from the English county of Essex. Essex is one of only 2 counties that are entirely within the Adirondack Park, the other being Hamilton County. The county is part of the North Country region of the state.

Elizabethtown is a hamlet and census-designated place (CDP) in the town of Elizabethtown in Essex County, New York, United States. The population of the CDP was 754 at the 2010 census, out of a total town population of 1,163.