ZIP Code 20660 — undefined, MD Demographics & Data

ZIP code 20660 covers MD in St. Mary's County with a population of about 16.

It sits in telephone area codes 227, 240, 301; U.S. House district MD-5; the WASHINGTON, DC (HAGRSTWN) media market.

On socioeconomic markers, US5 shows a poverty rate of 100.0%.

Housing tenure and rents show owner-occupancy near 100.0% (about 34.6 points above the national owner-occupancy rate (65.4%)).

FEMA’s National Risk Index rates natural-hazard risk for MD as Very Low (composite score 42.6), which is near the middle of the national distribution. The strongest component scores on US5 are hurricane (85.1) and wildfire (59.0). 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 MD show little to no average snow and around 48.1 inches of annual precipitation.

IRS migration statistics show a net inflow of about 1 for ZIP 20660 (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.