Welcome to Lewis County, NY!  

 Lewis County   is a   county   located in the   U.S. state   of   New York   . As of the   2010 census   , the population was 27,087,   making it the fourth-least populous county in New York. Its   county seat   is   Lowville   .   The county is named after   Morgan Lewis   , the   Governor of New York   when the county was established