what county is hillside nj in
Hillside is part of Union County. As of 2005-2009, the total Hillside population is 21,229, which has shrunk 2.38% since 2000. The population growth rate is much lower than the state average rate of 4.49% and is much lower than the national average rate of 9.71%. Hillside median household income is $60,602 in 2005-2009 and has grown by 2.48% since 2000.