Unlike most of upstate New York, Jefferson County is gaining residents.
"Jefferson County was one of just nine counties in upstate New York that had a higher population in 2015 than it did in 2010," said Ken Girardin, policy analyst with the Empire Center for Public Policy.
Cattaraugus County’s population continued to drop in the first half of this decade, losing 3.03 percent of its residents and leaving it in 55th place among 62 counties in terms of population growth.
The 2010 census showed Cattaraugus County with 80,317 residents. As of Dec. 31, 2015, it had dropped to 77,885, a loss of 2,432.
From 2010 to 2015, 2,789 people left the county, or 3.47 percent of the population, a report by the Empire Center for Public Policy in Albany shows. At the same time, there was a natural increase in the population of 524, or 0.65 percent.
Upstate New York's population began to decline at a faster rate between mid-2014 and 2015, according to updated Census Bureau estimates.
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Upstate New York's largest cities saw slight population declines over the year ending July 1, 2014, while New York City and other downstate cities saw a slight bump, according to new estimates from the U.S. Census Bureau.
The population in upstate New York is shrinking.