ZIP Code 21231 — Baltimore city, MD Demographics & Data

ZIP code 21231 covers Baltimore, MD in Baltimore city with a population of about 14,556.

At a glance, the area shows median age of 32.4 versus a U.S. median of about 38.9.

It sits in telephone area codes 410, 443, 667; U.S. House district MD-7; the BALTIMORE media market.

Baltimore, MD sits in a university / college context (near university system of maryland (0.7 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 21231 is about $85,382 — about 14% above the U.S. median ($75,149).

On socioeconomic markers, US5 shows a poverty rate of 19.9%; unemployment rate near 4.4%; 65.9% of adults with a bachelor’s degree or higher (about 32.2 points above the national share (33.7%)).

Labor and commute patterns include leading industry context around Healthcare, Professional services, and Education; about 24.8% of workers reporting work-from-home (about 9.6 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 $336,500 — about 3% below the U.S. median home value ($348,079).

Housing tenure and rents show median gross rent around $1,571 (about 35% above the U.S. median rent ($1,163)), and owner-occupancy near 35.0% (about 30.4 points below the national owner-occupancy rate (65.4%)).

To comfortably buy a median-priced home in ZIP 21231 in Baltimore, MD, a household would need roughly $93,000 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 $2,162. That is roughly in line with the local median household income ($85,382). Rates, taxes, insurance, and HOA fees vary — treat this as a planning estimate, not a lender quote.

Climate normals for Baltimore city, MD show little to no average snow and around 43.7 inches of annual precipitation.

IRS migration statistics show a net inflow of about 855 for ZIP 21231 (Baltimore city, 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.