ZIP Code 18020 — Middletown CDP, PA Demographics & Data

ZIP code 18020 covers Middletown, PA in Northampton County with a population of about 21,144.

At a glance, the area shows median age of 42.3 versus a U.S. median of about 38.9.

It sits in telephone area codes 484, 610, 835; U.S. House district PA-7; the PHILADELPHIA media market.

Middletown, PA sits in a university / college context (near northampton county area community college (0.2 mi)). Expect stronger interest in student housing, rentals, walkability, transit, and a younger adult age mix versus typical suburban ZIPs.

Median household income in ZIP 18020 is about $122,610 — about 63% above the U.S. median ($75,149).

On socioeconomic markers, US5 shows a poverty rate of 6.2%; unemployment rate near 3.5%; 41.8% of adults with a bachelor’s degree or higher (about 8.1 points above the national share (33.7%)).

Labor and commute patterns include leading industry context around Manufacturing, Healthcare, and Education; about 14.0% of workers reporting work-from-home (about 1.2 points below 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 $348,900 — about even with the U.S. median home value ($348,079).

Housing tenure and rents show median gross rent around $1,372 (about 18% above the U.S. median rent ($1,163)), and owner-occupancy near 85.4% (about 20.0 points above the national owner-occupancy rate (65.4%)).

To comfortably buy a median-priced home in ZIP 18020 in Middletown, PA, a household would need roughly $96,000 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 $2,241. That sits below the local median household income ($122,610), suggesting the typical household income is closer to a workable buy-in level under these assumptions. 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 Middletown CDP, PA as Relatively Moderate (composite score 90.0), which is among the highest nationally. The strongest component scores on US5 are flood (93.6) and hurricane (87.1). 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 Middletown CDP, PA show little to no average snow and around 47.4 inches of annual precipitation.

IRS migration statistics show a net inflow of about 963 for ZIP 18020 (Middletown CDP, PA) 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.