In 2023, Mountainside, NJ had a population of 6.97k people with a median age of 48.7 and a median household income of $210,100. Between 2022 and 2023 the population of Mountainside, NJ declined from 6,991 to 6,967, a −0.343% decrease and its median household income grew from $162,531 to $210,100, a 29.3% increase.
The 5 largest ethnic groups in Mountainside, NJ are White (Non-Hispanic) (72.7%), Asian (Non-Hispanic) (11.4%), Two+ (Hispanic) (10.1%), White (Hispanic) (2.6%), and Two+ (Non-Hispanic) (1.15%).
None of the households in Mountainside, NJ reported speaking a non-English language at home as their primary shared language. This does not consider the potential multi-lingual nature of households, but only the primary self-reported language spoken by all members of the household.
91.6% of the residents in Mountainside, NJ are U.S. citizens.
In 2023, the median property value in Mountainside, NJ was $755,600, and the homeownership rate was 86.9%.
Most people in Mountainside, NJ drove alone to work, and the average commute time was 38.9 minutes. The average car ownership in Mountainside, NJ was 2 cars per household.