21224 ZIP Code, Baltimore, MD

21224 is a ZIP code in Baltimore, Maryland — mostly in Baltimore city (73% of its land), with smaller parts in Baltimore County. It covers 9.3 square miles of land. The closest ZIP codes are 21205, 21222 and 21231. 47,465 people live here in 20,962 households, more than in 9 of every 10 Maryland ZIP codes. At about 5,090 people per square mile it is built up to city-neighborhood density, and owners and renters are mixed (59% own). Median household income is $89,017, below the Maryland median of $103,678.

Quick facts

Key figures

MeasureValue
Residents47,465
Households20,962
Median household income$89,017
Income per person$52,794
Median age34.3
Homeowners58.5%
Median home value$295,200
Median rent$1,778
Bachelor's degree or higher48.6%
Average commute (minutes)28.6
Households with kids under 1823.6%
Moved in the past year16.6%
Below the poverty line14.1%
Broadband internet91.9%
Speak a non-English language at home24.9%

Household income

% of householdsValue
<$10K2.8%
$10–15K3.1%
$15–25K6.6%
$25–35K6.6%
$35–50K8.1%
$50–75K14.2%
$75–100K13.6%
$100–150K17.3%
$150–200K12.0%
$200K+15.7%

Age

% of all residentsValue
<1011.4%
10–1911.5%
20–243.8%
25–3424.8%
35–4417.3%
45–549.0%
55–649.7%
65–747.4%
75+5.1%

Tenure

% of housing unitsValue
Owned, with mortgage38.7%
Owned outright13.7%
Rented36.7%
Vacant10.9%

Type of building

% of housing unitsValue
Detached house9.5%
Townhome73.2%
2–4 units4.1%
5–19 units2.8%
20+ units10.1%
Mobile / other0.3%

Businesses in 21224

1,518 business establishments with 40,767 employees (ZIP Codes Business Patterns 2023).

EDDM carrier routes

21224 has 40 USPS carrier routes with 24,354 residential and 2,125 business mailboxes. Open the EDDM route map.

Carrier routes in 21224

21224 has 40 USPS carrier routes (40 city (C)) with 24,354 residential and 2,125 business mailboxes. Routes range from 116 homes (C050) to 978 homes (C048); the median route has 614 homes. The Census counted 20,962 households in 21224 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per routeRoutes
1–2493
250–4997
500–74919
750–99911
1,000–1,4990
1,500+0

Best routes in 21224 for…

Most businesses

For B2B offers: office supplies, cleaning, IT, catering and commercial services.

  1. Route C029 — USPS business mailboxes 242, 247 homes
  2. Route C022 — USPS business mailboxes 205, 567 homes
  3. Route C033 — USPS business mailboxes 171, 533 homes
  4. Route C011 — USPS business mailboxes 137, 367 homes
  5. Route C025 — USPS business mailboxes 121, 291 homes

Select these 5 routes on the route map

Every carrier route in 21224

RouteTypeHomesBusinessesEst. median incomeEst. ownersEst. families with kidsEst. moved in past year
C001City76023$66,707———
C002City6485$107,395———
C003City69412$144,782———
C004City79520$112,142———
C005City59724$45,161———
C006City63912$156,408———
C007City43261$119,577———
C010City77618$122,514———
C011City367137————
C012City69412$108,993———
C014City537111$144,782———
C015City46638$52,463———
C017City75035$79,021———
C020City64314$117,381———
C021City942111$109,960———
C022City567205$112,142———
C023City66119$78,523———
C024City41280$124,202———
C025City291121————
C026City94515$22,103———
C027City6244$18,323———
C028City47722$78,523———
C029City247242$54,385———
C030City5339$78,523———
C031City7439$74,089———
C033City533171$39,358———
C035City57074$170,266———
C036City58347$52,427———
C038City217101$86,812———
C039City64154$45,556———
C040City60431$173,645———
C041City81423$158,580———
C042City5966$45,556———
C043City60213$142,230———
C044City30882$64,429———
C045City77410$119,939———
C046City80110$144,782———
C048City97839$47,215———
C049City97750$86,812———
C050City11655$45,556———

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 21224 on the EDDM route map.

How route demographics are estimated

Mailbox counts come from USPS; demographics are estimates

The number of homes and businesses on each carrier route is the current USPS EDDM count. The Census Bureau does not publish figures for carrier routes, so income, homeownership, ages, families, movers and housing age on a route are EDDM2GO estimates built from Census block groups (neighborhood areas of roughly 600 to 3,000 people).

How a route gets its figures: the block-group length-share method

We trace each route's streets every 25 meters and record which block group each stretch falls in. The route's homes are spread along its streets in proportion to length, so a route with 60% of its street length in one block group is assumed to have 60% of its homes there. Each block group then contributes its Census counts in proportion to the share of its housing units that sit on the route (capped at the whole block group). Medians are recalculated from the combined income, home-value and age brackets, the way the Census Bureau computes them, not averaged.

Margins of error

Census survey figures carry a margin of error at 90% confidence; we carry it through the calculation and show it as ±. Our margins treat the route-to-block-group split as exact, so the real uncertainty is larger. Routes with fewer than 100 estimated households, large margins, or streets we could not place are flagged.

Different years

USPS mailbox counts are current. Census figures are 5-year averages for 2020–2024, so a new subdivision may have more homes on the route today than the Census counted. Use the route figures to compare routes with each other, not as an exact head count.

Why some routes show identical figures

Two routes that run through the same block group get the same percentages and medians, because the Census publishes one set of figures for the whole block group. Their mailbox counts still differ, and those are exact.

Route and mailbox counts: USPS EDDM route data. Route demographics: EDDM2GO estimates from U.S. Census Bureau American Community Survey 5-year block-group data (2020–2024) and 2024 cartographic block-group boundaries. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.

Nearby ZIP codes

Areas that include 21224

Where it ranks

Mail every home in 21224

Route counts on this page price as Full Service 6.5 × 9 postcards: we print, bundle by carrier route and hand the mailing to USPS. Prefer to take it to the Post Office yourself? Print only costs less and you pay postage at drop-off.

Baltimore EDDM mailing

EDDM guides

ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 21224, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 21224 in?
21224 is a Baltimore, MD mailing address. By land area, 73% lies inside Baltimore and 27% lies inside Dundalk.
What county is 21224 in?
21224 is mostly in Baltimore city (73% of its land), with smaller parts in Baltimore County.
What is the population of 21224?
About 47,465 people (±2,381), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 54,266.
What is the median household income in 21224?
$89,017 (±$5,240), compared with $103,678 for Maryland as a whole. Half the households in the ZIP code earn more and half earn less.
How many carrier routes and mailboxes are in 21224?
40 USPS carrier routes with 24,354 residential and 2,125 business mailboxes (26,479 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 21224?
The closest, measured center to center: 21205 (2.2 mi, Baltimore), 21222 (2.6 mi, Dundalk), 21231 (2.8 mi, Baltimore), 21287 (3 mi, Baltimore), 21213 (3.3 mi, Baltimore) and 21233 (3.6 mi, Baltimore).

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.