This document shows population data for counties in New York from 2010-2015. It provides the 2010 population, population change from 2010-2015, percentage change, natural change from births and deaths, international migration, domestic migration, and domestic migration rate for each county. Many counties experienced population declines between 2010-2015, ranging from -4,415 people in Ulster County to -1,117 people in Wyoming County. Factors contributing to changes included natural change, international migration, and domestic migration in and out of each county.