ZIP Code 08553 — Rocky Hill borough, NJ Demographics & Data

ZIP code 08553 covers Rocky Hill, NJ in Somerset County with a population of about 814.

At a glance, the area shows median age of 42.8 versus a U.S. median of about 38.9.

It sits in telephone area codes 609, 640; U.S. House district NJ-12; the NEW YORK media market.

Rocky Hill, NJ aligns with a tech / corporate-campus profile (high remote-work / education / income profile or known campus context). Broadband quality, remote-work share, and nearby employer campuses often matter as much as classic residential stats.

Median household income in ZIP 08553 is about $127,344 — about 69% above the U.S. median ($75,149).

On socioeconomic markers, US5 shows a poverty rate of 4.3%; unemployment rate near 6.1%; 72.5% of adults with a bachelor’s degree or higher (about 38.8 points above the national share (33.7%)).

Labor and commute patterns include leading industry context around Professional services, Education, and Healthcare; about 27.3% of workers reporting work-from-home (about 12.1 points above the U.S. share (15.2%)); a mean commute of about 180.0 minutes (U.S. average near 26.8).

Median home value is about $608,200 — about 75% above the U.S. median home value ($348,079).

Housing tenure and rents show median gross rent around $1,567 (about 35% above the U.S. median rent ($1,163)), and owner-occupancy near 75.9% (about 10.5 points above the national owner-occupancy rate (65.4%)).

To comfortably buy a median-priced home in ZIP 08553 in Rocky Hill, NJ, a household would need roughly $167,000 in annual income under a 20% down, 30-year loan at 6.8% (illustrative), keeping housing costs near 28% of income. Estimated monthly PITI is about $3,907. That is about 31% above the local median household income ($127,344), so the median earner would likely stretch or need a larger down payment. Rates, taxes, insurance, and HOA fees vary — treat this as a planning estimate, not a lender quote.

FEMA’s National Risk Index rates natural-hazard risk for Rocky Hill borough, NJ as Relatively Moderate (composite score 90.9), which is among the highest nationally. The strongest component scores on US5 are flood (95.0) and hurricane (83.5). These scores are county-linked NRI values published for planning context — all ZIP codes in the same county share the same composite score on US5. Useful when comparing insurance and disaster exposure across areas, not a substitute for a parcel-level flood or fire determination.

Climate normals for Rocky Hill borough, NJ show little to no average snow and around 51.0 inches of annual precipitation.

IRS migration statistics show a net inflow of about 52 for ZIP 08553 (Rocky Hill borough, NJ) on US5’s published series — a signal of people/tax filers moving in relative to those leaving. Inflows often track job growth, housing demand, or lifestyle migration; treat the figure as a directional indicator rather than a precise headcount.