Cost of Living in Mountainside, NJ

With a cost of living index of 208, Mountainside, NJ is one of the most expensive cities in the United States. Living here is 108% more expensive than the national average and 80% above the New Jersey state average of 128. Mountainside is a smaller community of 6,967 residents, where everyday costs can differ substantially from nearby larger cities.

Housing costs are the biggest factor in Mountainside's cost of living. The median monthly rent is $3,501 (165% above the US median of $1,319), and the median home value sits at $755,600 (148% above the national median of $304,900). At current prices, the median home costs roughly 3.6x the median household income — a moderately affordable ratio by today's standards.

The median household income in Mountainside is $210,100, which is 180% higher than the national median of $75,149. Residents spend roughly 20% of household income on rent. This is a comfortable ratio, well below the 30% threshold that financial experts recommend as a maximum. While incomes are above average, they more than offset the higher cost of living.

Everyday prices in the New York-Newark-Jersey City, NY-NJ (Metropolitan Statistical Area) metro area tend to run above the national average. Out of 6 common grocery and utility items tracked by the Bureau of Labor Statistics, 6 are priced higher than the US average. These real-world prices — from groceries to electricity — add up and should be factored into any cost of living comparison.

Data sources: US Census Bureau (ACS 2023), Zillow Home Values, HUD Fair Market Rents, BEA Regional Price Parities, BLS Average Prices, and NOAA Climate Normals. Updated monthly.