Leyden is a town in Lewis County, New York, United States.

[4] The town is in the southern part of the county and is north of Rome.

Leyden was formed from the town of Steuben (in Oneida County) in 1797.

Leyden formed part of a tract called the "Inman Triangle".

As of the census[8] of 2000, there were 1,792 people, 676 households, and 488 families residing in the town.

23.7% of all households were made up of individuals, and 9.9% had someone living alone who was 65 years of age or older.