ZIP Code 21009 — Bel Air South CDP, MD Demographics & Data

ZIP code 21009 covers Bel Air South, MD in Harford County with a population of about 33,444.

At a glance, the area shows median age of 36.1 versus a U.S. median of about 38.9.

It sits in telephone area codes 410, 443, 667; U.S. House district MD-1; the BALTIMORE media market.

Median household income in ZIP 21009 is about $117,017 — about 56% above the U.S. median ($75,149).

On socioeconomic markers, US5 shows a poverty rate of 3.9%; unemployment rate near 3.6%; 39.7% of adults with a bachelor’s degree or higher (about 6.0 points above the national share (33.7%)).

Labor and commute patterns include leading industry context around Professional services, Healthcare, and Public administration; about 14.7% of workers reporting work-from-home (roughly in line with 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 $335,100 — about 4% below the U.S. median home value ($348,079).

Housing tenure and rents show median gross rent around $1,491 (about 28% above the U.S. median rent ($1,163)), and owner-occupancy near 81.3% (about 15.9 points above the national owner-occupancy rate (65.4%)).

To comfortably buy a median-priced home in ZIP 21009 in Bel Air South, MD, a household would need roughly $92,000 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 $2,153. That sits below the local median household income ($117,017), 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 Bel Air South CDP, MD as Relatively Low (composite score 72.5), which is elevated versus much of the country. The strongest component scores on US5 are hurricane (81.6) and flood (78.4). 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 Bel Air South CDP, MD show little to no average snow and around 47.1 inches of annual precipitation.

IRS migration statistics show a net inflow of about 1,965 for ZIP 21009 (Bel Air South CDP, MD) 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.