What city is 21040 in?

21040 is a Edgewood, MD mailing address. By land area, 99% lies inside Edgewood.

What is the population of 21040?

About 24,960 people (±1,939), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 25,138.

What is the median household income in 21040?

$81,704 (±$7,484), 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 21040?

12 USPS carrier routes with 9,430 residential and 406 business mailboxes (9,837 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 21040?

The closest, measured center to center: 21010 (2.7 mi, Edgewood), 21009 (2.9 mi, Bel Air South), 21017 (4.1 mi, Riverside), 21085 (4.1 mi, Joppatowne), 21130 (5.9 mi, Perryman) and 21156 (6.4 mi, Kingsville).

21040 ZIP Code, Edgewood, MD

21040 is a ZIP code in Edgewood, Maryland in Harford County. It covers 9.8 square miles of land. The closest ZIP codes are 21010, 21009 and 21017. 24,960 people live here in 9,795 households. At about 2,543 people per square mile it has suburban density, and most homes are owner-occupied (71%). Median household income is $81,704, below the Maryland median of $103,678.

Quick facts

Mailing city: Edgewood, MD
County: Harford County
Land area: 9.8 sq mi
Population: 24,960
Median household income: $81,704
Carrier routes: 12 (9,430 homes)

Key figures

Measure	Value
Residents	24,960
Households	9,795
Median household income	$81,704
Income per person	$36,347
Median age	36.4
Homeowners	71.1%
Median home value	$238,000
Median rent	$1,360
Bachelor's degree or higher	22.8%
Average commute (minutes)	31.3
Households with kids under 18	35.0%
Moved in the past year	18.0%
Below the poverty line	12.2%
Broadband internet	90.5%
Speak a non-English language at home	12.3%

Household income

% of households	Value
<$10K	6.2%
$10–15K	2.4%
$15–25K	4.0%
$25–35K	7.1%
$35–50K	13.8%
$50–75K	11.7%
$75–100K	14.7%
$100–150K	22.4%
$150–200K	11.4%
$200K+	6.4%

Age

% of all residents	Value
<10	16.3%
10–19	11.5%
20–24	5.9%
25–34	15.5%
35–44	12.4%
45–54	12.6%
55–64	11.5%
65–74	10.1%
75+	4.1%

Tenure

% of housing units	Value
Owned, with mortgage	52.5%
Owned outright	15.9%
Rented	27.4%
Vacant	4.3%

Type of building

% of housing units	Value
Detached house	41.9%
Townhome	33.2%
2–4 units	7.0%
5–19 units	10.4%
20+ units	2.6%
Mobile / other	4.9%

Businesses in 21040

322 business establishments with 5,960 employees (ZIP Codes Business Patterns 2023).

Retail Trade: 53
Accommodation and Food Services: 45
Construction: 40
Health Care and Social Assistance: 40
Other Services (except Public Administration): 36
Administrative and Support and Waste Management and Remediation Services: 20
Professional, Scientific, and Technical Services: 18
Transportation and Warehousing: 17

EDDM carrier routes

21040 has 12 USPS carrier routes with 9,430 residential and 406 business mailboxes. Open the EDDM route map.

Carrier routes in 21040

21040 has 12 USPS carrier routes (9 city (C), 3 rural (R)) with 9,430 residential and 406 business mailboxes. Routes range from 418 homes (R003) to 1,217 homes (C003); the median route has 773 homes. The Census counted 9,795 households in 21040 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	0
250–499	1
500–749	4
750–999	4
1,000–1,499	3
1,500+	0

Best routes in 21040 for…

Most businesses

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

Route C008 — USPS business mailboxes 163, 782 homes
Route R003 — USPS business mailboxes 98, 418 homes
Route R002 — USPS business mailboxes 64, 608 homes
Route C001 — USPS business mailboxes 37, 1,027 homes
Route C002 — USPS business mailboxes 19, 558 homes

Select these 5 routes on the route map

Every carrier route in 21040

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
C001	City	1,027	37	$77,678	—	—	—
C002	City	558	19	$77,142	—	—	—
C003	City	1,217	9	$77,678	—	—	—
C005	City	764	0	$89,345	—	—	—
C007	City	833	3	$71,859	—	—	—
C008	City	782	163	$101,549	—	—	—
C009	City	675	4	$79,262	—	—	—
C010	City	891	1	$101,549	—	—	—
C011	City	1,036	6	$95,495	—	—	—
R001	Rural	621	2	$117,468	—	—	—
R002	Rural	608	64	$156,664	—	—	—
R003	Rural	418	98	$52,104	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 21040 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

21010 — Edgewood CDP, MD (2.7 mi)
21009 — Bel Air South CDP, MD (2.9 mi)
21017 — Riverside CDP, MD (4.1 mi)
21085 — Joppatowne CDP, MD (4.1 mi)
21130 — Perryman CDP, MD (5.9 mi)
21156 — Kingsville CDP, MD (6.4 mi)
21001 — Aberdeen city, MD (6.8 mi)
21087 — Kingsville CDP, MD (7 mi)

Areas that include 21040

Where it ranks

Mail every home in 21040

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.

EDDM guides

ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 21040, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 21040 in?: 21040 is a Edgewood, MD mailing address. By land area, 99% lies inside Edgewood.
What county is 21040 in?: 21040 is in Harford County.
What is the population of 21040?: About 24,960 people (±1,939), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 25,138.
What is the median household income in 21040?: $81,704 (±$7,484), 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 21040?: 12 USPS carrier routes with 9,430 residential and 406 business mailboxes (9,837 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 21040?: The closest, measured center to center: 21010 (2.7 mi, Edgewood), 21009 (2.9 mi, Bel Air South), 21017 (4.1 mi, Riverside), 21085 (4.1 mi, Joppatowne), 21130 (5.9 mi, Perryman) and 21156 (6.4 mi, Kingsville).

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