What city is 08638 in?

08638 is a Trenton, NJ mailing address. By land area, 22% lies inside Trenton and 3% lies inside The College of New Jersey; the rest is outside any Census-defined city or community.

What is the population of 08638?

About 22,816 people (±1,468), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 23,548.

What is the median household income in 08638?

$66,875 (±$6,861), compared with $103,556 for New Jersey as a whole. Half the households in the ZIP code earn more and half earn less.

How many carrier routes and mailboxes are in 08638?

16 USPS carrier routes with 9,709 residential and 810 business mailboxes (10,519 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 08638?

The closest, measured center to center: 08618 (1.4 mi, Trenton), 08609 (2.3 mi, Trenton), 08608 (2.4 mi, Trenton), 08629 (2.9 mi, Trenton), 08648 (3.2 mi, Lawrenceville) and 08628 (3.4 mi, Trenton).

08638 ZIP Code, Trenton, NJ

08638 is a ZIP code in Trenton, New Jersey in Mercer County. It covers 5.4 square miles of land. The closest ZIP codes are 08618, 08609 and 08608. 22,816 people live here in 9,045 households. At about 4,204 people per square mile it is built up to city-neighborhood density, and owners and renters are mixed (58% own). Median household income is $66,875, well below the New Jersey median of $103,556.

Quick facts

Mailing city: Trenton, NJ
County: Mercer County
Land area: 5.4 sq mi
Population: 22,816
Median household income: $66,875
Carrier routes: 16 (9,709 homes)

Key figures

Measure	Value
Residents	22,816
Households	9,045
Median household income	$66,875
Income per person	$34,445
Median age	35.9
Homeowners	58.0%
Median home value	$245,100
Median rent	$1,593
Bachelor's degree or higher	32.3%
Average commute (minutes)	25.5
Households with kids under 18	26.2%
Moved in the past year	15.3%
Below the poverty line	17.8%
Broadband internet	88.0%
Speak a non-English language at home	24.7%

Household income

% of households	Value
<$10K	12.2%
$10–15K	3.6%
$15–25K	4.0%
$25–35K	7.1%
$35–50K	10.2%
$50–75K	17.2%
$75–100K	12.2%
$100–150K	19.0%
$150–200K	9.5%
$200K+	5.0%

Age

% of all residents	Value
<10	10.4%
10–19	15.4%
20–24	9.0%
25–34	13.7%
35–44	12.6%
45–54	13.8%
55–64	10.4%
65–74	9.9%
75+	4.8%

Tenure

% of housing units	Value
Owned, with mortgage	34.4%
Owned outright	17.9%
Rented	37.6%
Vacant	10.0%

Type of building

% of housing units	Value
Detached house	47.3%
Townhome	22.5%
2–4 units	5.1%
5–19 units	8.8%
20+ units	16.2%
Mobile / other	0.1%

Businesses in 08638

553 business establishments with 11,018 employees (ZIP Codes Business Patterns 2023).

Retail Trade: 105
Health Care and Social Assistance: 61
Other Services (except Public Administration): 59
Construction: 57
Wholesale Trade: 47
Administrative and Support and Waste Management and Remediation Services: 47
Accommodation and Food Services: 44
Manufacturing: 36

EDDM carrier routes

08638 has 16 USPS carrier routes with 9,709 residential and 810 business mailboxes. Open the EDDM route map.

Carrier routes in 08638

08638 has 16 USPS carrier routes (16 city (C)) with 9,709 residential and 810 business mailboxes. Routes range from 311 homes (C053) to 1,123 homes (C009); the median route has 571 homes. The Census counted 9,045 households in 08638 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	0
250–499	5
500–749	8
750–999	2
1,000–1,499	1
1,500+	0

Best routes in 08638 for…

Most businesses

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

Route C008 — USPS business mailboxes 168, 329 homes
Route C057 — USPS business mailboxes 116, 435 homes
Route C096 — USPS business mailboxes 110, 473 homes
Route C095 — USPS business mailboxes 86, 759 homes
Route C006 — USPS business mailboxes 71, 615 homes

Select these 5 routes on the route map

Every carrier route in 08638

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
C001	City	526	17	$84,925	—	—	—
C006	City	615	71	$30,053	—	—	—
C008	City	329	168	$111,887	—	—	—
C009	City	1,123	28	$156,990	—	—	—
C032	City	760	40	$59,629	—	—	—
C043	City	727	4	$61,577	—	—	—
C045	City	455	3	$101,666	—	—	—
C053	City	311	6	$156,990	—	—	—
C057	City	435	116	$51,428	—	—	—
C059	City	725	61	$60,738	—	—	—
C079	City	511	38	$101,666	—	—	—
C084	City	726	4	$44,353	—	—	—
C087	City	510	1	$105,136	—	—	—
C095	City	759	86	$33,732	—	—	—
C096	City	473	110	$101,666	—	—	—
C099	City	724	57	$51,428	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 08638 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

08618 — Trenton city, NJ (1.4 mi)
08609 — Trenton city, NJ (2.3 mi)
08608 — Trenton city, NJ (2.4 mi)
08629 — Trenton city, NJ (2.9 mi)
08648 — Lawrenceville CDP, NJ (3.2 mi)
08628 — Trenton city, NJ (3.4 mi)
08619 — Mercerville CDP, NJ (3.6 mi)
08610 — White Horse CDP, NJ (4.9 mi)

Areas that include 08638

Trenton, NJ ZIP codes — 11 ZIP codes
The College of New Jersey, NJ ZIP codes — 2 ZIP codes
Mercer County ZIP codes — 23 ZIP codes
New Jersey ZIP code data

Where it ranks

Mail every home in 08638

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) 08638, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 08638 in?: 08638 is a Trenton, NJ mailing address. By land area, 22% lies inside Trenton and 3% lies inside The College of New Jersey; the rest is outside any Census-defined city or community.
What county is 08638 in?: 08638 is in Mercer County.
What is the population of 08638?: About 22,816 people (±1,468), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 23,548.
What is the median household income in 08638?: $66,875 (±$6,861), compared with $103,556 for New Jersey as a whole. Half the households in the ZIP code earn more and half earn less.
How many carrier routes and mailboxes are in 08638?: 16 USPS carrier routes with 9,709 residential and 810 business mailboxes (10,519 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 08638?: The closest, measured center to center: 08618 (1.4 mi, Trenton), 08609 (2.3 mi, Trenton), 08608 (2.4 mi, Trenton), 08629 (2.9 mi, Trenton), 08648 (3.2 mi, Lawrenceville) and 08628 (3.4 mi, Trenton).

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