Lackawanna is a city in Erie County, New York, United States, just south of the city of Buffalo in western New York State. The population was 19,949 at the 2020 census. It is one of the fastest-growing cities in New York, growing in population by 10% from 2010 to 2020. It is part of the Buffalo-Niagara Falls metropolitan area. The city of Lackawanna is in the western part of Erie County.

The Buffalo–Niagara Falls Metropolitan Statistical Area is a metropolitan area, designated by the United States Census Bureau, encompassing two counties - Erie and Niagara - in the state of New York. It has a population of over 1.1 million people and is the second-largest metropolitan area in the state. As of the 2020 U S. census, the metropolitan statistical area (MSA) had a population of 1,166,902. The larger Buffalo Niagara Region is an economic zone consisting of eight counties in Western New York.