population of buffalo
Buffalo, NY Population and Races Buffalo, NY Population and Races. As of 2010-2014, the total population of Buffalo is 259,959, which is 11.17% less than it was in 2000. The population growth rate is much lower than the state average rate of 3.26% and is much lower than the national average rate of 11.61%. The Buffalo population density is 4,952.19 people per square mile, which is much higher than the state average density of 359.17 people per square mile and is much higher than the national average density of 82.73 people per square mile.