ZIP Code 21733 — St. James CDP, MD Demographics & Data

ZIP code 21733 covers St. James, MD in Washington County with a population of about 1,240.

At a glance, the area shows median age of 38.1 (near the U.S. median).

It sits in telephone area codes 227, 240, 301; U.S. House district MD-6; the WASHINGTON, DC (HAGRSTWN) media market.

Median household income in ZIP 21733 is about $106,667 — about 42% above the U.S. median ($75,149).

On socioeconomic markers, US5 shows a poverty rate of 3.1%; unemployment rate near 0.0%; 31.9% of adults with a bachelor’s degree or higher (about 1.8 points below the national share (33.7%)).

Labor and commute patterns include leading industry context around Manufacturing, Professional services, and Education; about 17.6% of workers reporting work-from-home (about 2.4 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 $316,300 — about 9% below the U.S. median home value ($348,079).

Housing tenure and rents show owner-occupancy near 86.0% (about 20.6 points above the national owner-occupancy rate (65.4%)).

To comfortably buy a median-priced home in ZIP 21733 in St. James, MD, a household would need roughly $87,000 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 $2,032. That sits below the local median household income ($106,667), 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 St. James CDP, MD as Relatively Low (composite score 68.8), which is near the middle of the national distribution. The strongest component scores on US5 are hurricane (85.7) and flood (73.1). 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 St. James CDP, MD show little to no average snow and around 43.5 inches of annual precipitation.

IRS migration statistics show a net inflow of about 73 for ZIP 21733 (St. James 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.