Harrisville is a hamlet and former village in Lewis County, New York, United States. The community is now a census-designated place. The population was 628 at the 2010 census. Harrisville is in the northeastern part of the town of Diana and is south of Gouverneur. On May 15, 2018, residents voted to dissolve the village by a vote of 112–70, and it took effect on December 31, 2018. As of the 2019 American Community Survey, the U.S. Census Bureau still lists Harrisville as a village.