What city is 21210 in?

21210 is a Baltimore, MD mailing address. By land area, 84% lies inside Baltimore and 16% lies inside Towson.

What is the population of 21210?

About 14,134 people (±1,157), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 14,441.

What is the median household income in 21210?

$112,428 (±$11,958), 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 21210?

15 USPS carrier routes with 5,945 residential and 265 business mailboxes (6,210 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 21210?

The closest, measured center to center: 21212 (1.3 mi, Baltimore), 21209 (1.9 mi, Baltimore), 21211 (2 mi, Baltimore), 21285 (2.3 mi, Towson), 21215 (2.6 mi, Baltimore) and 21218 (2.6 mi, Baltimore).

21210 ZIP Code, Baltimore, MD

Q: What county is 21210 in?

21210 is mostly in Baltimore city (84% of its land), with smaller parts in Baltimore County.

21210 is a ZIP code in Baltimore, Maryland — mostly in Baltimore city (84% of its land), with smaller parts in Baltimore County. It covers 3.4 square miles of land. The closest ZIP codes are 21212, 21209 and 21211. 14,134 people live here in 5,202 households. At about 4,100 people per square mile it is built up to city-neighborhood density, and owners and renters are mixed (62% own). Median household income is $112,428, close to the Maryland median of $103,678.

Quick facts

Mailing city: Baltimore, MD
County: Baltimore city County
Land area: 3.4 sq mi
Population: 14,134
Median household income: $112,428
Carrier routes: 15 (5,945 homes)

Key figures

Measure	Value
Residents	14,134
Households	5,202
Median household income	$112,428
Income per person	$70,441
Median age	32
Homeowners	61.5%
Median home value	$547,300
Median rent	$1,535
Bachelor's degree or higher	83.6%
Average commute (minutes)	23.4
Households with kids under 18	24.8%
Moved in the past year	16.2%
Below the poverty line	7.3%
Broadband internet	97.8%
Speak a non-English language at home	16.2%

Household income

% of households	Value
<$10K	4.3%
$10–15K	2.7%
$15–25K	4.6%
$25–35K	2.5%
$35–50K	7.5%
$50–75K	7.4%
$75–100K	15.7%
$100–150K	14.4%
$150–200K	8.5%
$200K+	32.4%

Age

% of all residents	Value
<10	11.8%
10–19	18.4%
20–24	12.3%
25–34	10.3%
35–44	7.8%
45–54	12.0%
55–64	9.9%
65–74	9.0%
75+	8.4%

Tenure

% of housing units	Value
Owned, with mortgage	37.0%
Owned outright	20.5%
Rented	35.6%
Vacant	7.0%

Type of building

% of housing units	Value
Detached house	31.7%
Townhome	12.6%
2–4 units	5.3%
5–19 units	18.5%
20+ units	31.7%
Mobile / other	0.3%

Businesses in 21210

301 business establishments with 6,438 employees (ZIP Codes Business Patterns 2023).

Professional, Scientific, and Technical Services: 71
Health Care and Social Assistance: 53
Other Services (except Public Administration): 40
Accommodation and Food Services: 26
Retail Trade: 23
Real Estate and Rental and Leasing: 23
Finance and Insurance: 16
Educational Services: 16

EDDM carrier routes

21210 has 15 USPS carrier routes with 5,945 residential and 265 business mailboxes. Open the EDDM route map.

Carrier routes in 21210

21210 has 15 USPS carrier routes (15 city (C)) with 5,945 residential and 265 business mailboxes. Routes range from 143 homes (C015) to 1,173 homes (C021); the median route has 325 homes. The Census counted 5,202 households in 21210 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	4
250–499	8
500–749	2
750–999	0
1,000–1,499	1
1,500+	0

Best routes in 21210 for…

Most businesses

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

Route C013 — USPS business mailboxes 101, 219 homes
Route C015 — USPS business mailboxes 67, 143 homes
Route C001 — USPS business mailboxes 27, 447 homes
Route C021 — USPS business mailboxes 10, 1,173 homes
Route C006 — USPS business mailboxes 10, 249 homes

Select these 5 routes on the route map

Every carrier route in 21210

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
C001	City	447	27	$144,113	—	—	—
C002	City	455	3	$139,162	—	—	—
C003	City	239	6	$200,001+	—	—	—
C005	City	325	8	$120,228	—	—	—
C006	City	249	10	$120,228	—	—	—
C007	City	280	6	$198,924	—	—	—
C008	City	528	3	$73,233	—	—	—
C009	City	366	8	$139,162	—	—	—
C013	City	219	101	$200,001+	—	—	—
C015	City	143	67	$120,228	—	—	—
C017	City	338	1	$139,162	—	—	—
C018	City	570	6	$96,522	—	—	—
C020	City	312	1	$144,113	—	—	—
C021	City	1,173	10	$144,113	—	—	—
C024	City	301	8	$198,924	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 21210 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

21212 — Baltimore city, MD (1.3 mi)
21209 — Baltimore city, MD (1.9 mi)
21211 — Baltimore city, MD (2 mi)
21285 — Towson CDP, MD (2.3 mi)
21215 — Baltimore city, MD (2.6 mi)
21218 — Baltimore city, MD (2.6 mi)
21239 — Baltimore city, MD (2.6 mi)
21252 — Towson CDP, MD (2.8 mi)

Areas that include 21210

Baltimore, MD ZIP codes — 28 ZIP codes
Towson, MD ZIP codes — 8 ZIP codes
Baltimore city County ZIP codes — 26 ZIP codes
Baltimore County ZIP codes — 54 ZIP codes
Maryland ZIP code data

Where it ranks

Mail every home in 21210

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) 21210, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 21210 in?: 21210 is a Baltimore, MD mailing address. By land area, 84% lies inside Baltimore and 16% lies inside Towson.
What county is 21210 in?: 21210 is mostly in Baltimore city (84% of its land), with smaller parts in Baltimore County.
What is the population of 21210?: About 14,134 people (±1,157), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 14,441.
What is the median household income in 21210?: $112,428 (±$11,958), 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 21210?: 15 USPS carrier routes with 5,945 residential and 265 business mailboxes (6,210 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 21210?: The closest, measured center to center: 21212 (1.3 mi, Baltimore), 21209 (1.9 mi, Baltimore), 21211 (2 mi, Baltimore), 21285 (2.3 mi, Towson), 21215 (2.6 mi, Baltimore) and 21218 (2.6 mi, Baltimore).

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