ZIP Code 21090 — Linthicum CDP, MD Demographics & Data

ZIP code 21090 covers Linthicum, MD in Anne Arundel County with a population of about 10,033.

At a glance, the area shows median age of 38.3 (near the U.S. median).

It sits in telephone area codes 410, 443, 667; U.S. House district MD-3; the BALTIMORE media market.

Median household income in ZIP 21090 is about $124,688 — about 66% above the U.S. median ($75,149).

On socioeconomic markers, US5 shows a poverty rate of 3.0%; unemployment rate near 2.6%; 42.8% of adults with a bachelor’s degree or higher (about 9.1 points above the national share (33.7%)).

Labor and commute patterns include leading industry context around Education, Professional services, and Healthcare; about 16.0% 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 $374,300 — about 8% above the U.S. median home value ($348,079).

Housing tenure and rents show median gross rent around $1,760 (about 51% above the U.S. median rent ($1,163)), and owner-occupancy near 84.1% (about 18.7 points above the national owner-occupancy rate (65.4%)).

To comfortably buy a median-priced home in ZIP 21090 in Linthicum, MD, a household would need roughly $103,000 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 $2,404. That sits below the local median household income ($124,688), 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 Linthicum CDP, MD as Relatively Moderate (composite score 81.9), which is elevated versus much of the country. The strongest component scores on US5 are hurricane (87.2) and flood (80.9). 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 Linthicum CDP, MD show little to no average snow and around 45.0 inches of annual precipitation.

IRS migration statistics show a net inflow of about 589 for ZIP 21090 (Linthicum 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.