What city is 21673 in?

21673 is a Trappe, MD mailing address. By land area, 5% lies inside Trappe; the rest is outside any Census-defined city or community.

What is the population of 21673?

About 2,843 people (±401), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 3,122.

What is the median household income in 21673?

$68,194 (±$14,954), 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 21673?

3 USPS carrier routes with 1,568 residential and 45 business mailboxes (1,613 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 21673?

The closest, measured center to center: 21664 (5.7 mi, Secretary), 21654 (5.8 mi, Oxford), 21631 (7 mi, East New Market), 21643 (9.4 mi, Hurlock), 21835 (9.5 mi) and 21613 (9.8 mi, Cambridge).

21673 ZIP Code, Trappe, MD

21673 is a ZIP code in Trappe, Maryland in Talbot County. It covers 52 square miles of land. The closest ZIP codes are 21664, 21654 and 21631. 2,843 people live here in 1,203 households. It is rural, with fewer than 100 people per square mile, and most homes are owner-occupied (75%). Median household income is $68,194, well below the Maryland median of $103,678; the median age is 45.7, older than most ZIP codes.

Quick facts

Mailing city: Trappe, MD
County: Talbot County
Land area: 52 sq mi
Population: 2,843
Median household income: $68,194
Carrier routes: 3 (1,568 homes)

Key figures

Measure	Value
Residents	2,843
Households	1,203
Median household income	$68,194
Income per person	$62,912
Median age	45.7
Homeowners	75.1%
Median home value	$363,100
Median rent	$1,338
Bachelor's degree or higher	31.3%
Average commute (minutes)	27.6
Households with kids under 18	34.3%
Moved in the past year	17.2%
Below the poverty line	7.4%
Broadband internet	83.7%
Speak a non-English language at home	3.3%

Household income

% of households	Value
<$10K	2.7%
$10–15K	5.4%
$15–25K	10.4%
$25–35K	7.0%
$35–50K	12.9%
$50–75K	15.1%
$75–100K	13.2%
$100–150K	14.5%
$150–200K	4.2%
$200K+	14.5%

Age

% of all residents	Value
<10	14.9%
10–19	10.2%
20–24	2.5%
25–34	10.6%
35–44	11.0%
45–54	12.2%
55–64	21.4%
65–74	11.4%
75+	5.7%

Tenure

% of housing units	Value
Owned, with mortgage	41.7%
Owned outright	17.7%
Rented	19.1%
Vacant	21.5%

Type of building

% of housing units	Value
Detached house	86.6%
Townhome	4.3%
2–4 units	6.4%
5–19 units	1.6%
20+ units	0.0%
Mobile / other	1.2%

Businesses in 21673

66 business establishments with 378 employees (ZIP Codes Business Patterns 2023).

Construction: 20
Retail Trade: 11
Real Estate and Rental and Leasing: 5
Health Care and Social Assistance: 5
Transportation and Warehousing: 4
Administrative and Support and Waste Management and Remediation Services: 4
Accommodation and Food Services: 4
Other Services (except Public Administration): 3

EDDM carrier routes

21673 has 3 USPS carrier routes with 1,568 residential and 45 business mailboxes. Open the EDDM route map.

Carrier routes in 21673

21673 has 3 USPS carrier routes (3 rural (R)) with 1,568 residential and 45 business mailboxes. Routes range from 480 homes (R732) to 594 homes (R733); the median route has 494 homes. The Census counted 1,203 households in 21673 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

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

Best routes in 21673 for…

Most businesses

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

Route R732 — USPS business mailboxes 22, 480 homes
Route R733 — USPS business mailboxes 19, 594 homes
Route R731 — USPS business mailboxes 4, 494 homes

Select these 3 routes on the route map

Every carrier route in 21673

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
R731	Rural	494	4	$50,892	—	—	—
R732	Rural	480	22	$97,284	—	—	—
R733	Rural	594	19	$50,892	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 21673 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

21664 — Secretary town, MD (5.7 mi)
21654 — Oxford town, MD (5.8 mi)
21631 — East New Market town, MD (7 mi)
21643 — Hurlock town, MD (9.4 mi)
21835 (9.5 mi)
21613 — Cambridge city, MD (9.8 mi)
21662 (9.8 mi)
21653 (10 mi)

Areas that include 21673

Where it ranks

Mail every home in 21673

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) 21673, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 21673 in?: 21673 is a Trappe, MD mailing address. By land area, 5% lies inside Trappe; the rest is outside any Census-defined city or community.
What county is 21673 in?: 21673 is in Talbot County.
What is the population of 21673?: About 2,843 people (±401), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 3,122.
What is the median household income in 21673?: $68,194 (±$14,954), 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 21673?: 3 USPS carrier routes with 1,568 residential and 45 business mailboxes (1,613 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 21673?: The closest, measured center to center: 21664 (5.7 mi, Secretary), 21654 (5.8 mi, Oxford), 21631 (7 mi, East New Market), 21643 (9.4 mi, Hurlock), 21835 (9.5 mi) and 21613 (9.8 mi, Cambridge).

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