<page_title> Mountainside, New Jersey </page_title> <section_title> Demographics </section_title> <table> <cell> 1990 <col_header> Historical population </col_header> <col_header> Census </col_header> </cell> <cell> 6,657 <col_header> Historical population </col_header> <col_header> Pop. </col_header> </cell> <cell> 2000 <col_header> Historical population </col_header> <col_header> Census </col_header> </cell> <cell> 6,602 <col_header> Historical population </col_header> <col_header> Pop. </col_header> </cell> <cell> −0.8% <col_header> Historical population </col_header> <col_header> %± </col_header> </cell> <cell> 2010 <col_header> Historical population </col_header> <col_header> Census </col_header> </cell> <cell> 6,685 <col_header> Historical population </col_header> <col_header> Pop. </col_header> </cell> <cell> 1.3% <col_header> Historical population </col_header> <col_header> %± </col_header> </cell> </table>
As of the 2010 Census, the population of Mountainside was 6,685, reflecting an increase of 83 (+1.3%) from the 6,602 counted in the 2000 Census, which had in turn declined by 55 (-0.8%) from the 6,657 counted in the 1990 Census.