Zip Code 08638
Trenton, New Jersey — Mercer County
📍 ZIP code 08638 is in Trenton, Mercer County, New Jersey.
ZIP code 08638 is located in Trenton, Mercer County, New Jersey. It is a zip code in the Eastern (EST/EDT) Time Zone with an estimated population of 23,373. The area code for ZIP code 08638 is 609.
Quick Answer
Zip code 08638 is in Trenton, New Jersey (Mercer County). It has a population of 23,373, median household income of $65,650, and median home value of $226,700.
Population
23,373
Income
$65,650
Home Value
$226,700
Climate
87°F / 23°F
About Zip Code 08638
Zip code 08638 is located in Trenton, New Jersey, within Mercer County. Home to approximately 23,373 residents, this area sits at an elevation of 112 ft and falls within the Eastern (EST/EDT) timezone. The local area code is 609.
The median household income is $65,650 per year, which is below the national median of $70,784. Homes in this zip code have a median value of $226,700, and the cost of living index is 80 (20% below the national average of 100).
Summers average a high of 87°F while winters drop to 23°F. The area receives about 47 in of rain and 29 in of snow annually. The zip code covers 5.8 square miles of land area.
Key Statistics
23,373
$65,650
$226,700
Eastern (EST/EDT)
609
112 ft
5.8 sq mi
35.8
10,148
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Compare With Nearby Zip Codes
| Metric | 08638 | 08618 | 08609 | 08608 | 08629 | 08648 |
|---|---|---|---|---|---|---|
| City | Trenton, NJ | Trenton, NJ | Trenton, NJ | Trenton, NJ | Trenton, NJ | Trenton, NJ |
| Population | 23,373 | 37,162 | 13,000 | 1,118 | 13,015 | 31,142 |
| Median Income | $65,650 | $48,179 | $56,932 | $0 | $81,367 | $118,036 |
| Home Value | $226,700 | $211,800 | $96,700 | $0 | $149,000 | $395,400 |
| Cost of Living | 80 | 64 | 60 | 100 | 71 | 146 |
| Median Age | 35.8 | 33.7 | 35.6 | 31.4 | 35.2 | 39.4 |
Cost of Living
100 = National Average. Trenton's cost of living is 20% below the national average.
vs. State Avg
Below
Affordability
Very Affordable
Income-to-Home
3.5x
Demographics
Zip code 08638 has a population of 23,373 people with a median age of 35.8. There are 10,148 housing units in this area.
Racial & Ethnic Composition
Source: U.S. Census Bureau American Community Survey estimates.
Population History
Trenton (08638) population trend from 2010 to 2024
↑ 155.3%Source: U.S. Census Bureau estimates and American Community Survey data.
Climate & Weather
87°F
23°F
47 in
29 in
Trenton experiences warm summers with average highs around 87°F. Winters are cool with lows averaging 23°F. The area receives about 29 in of snow per year.
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Housing & Economy
Median Home Value
$226,700
Median Household Income
$65,650
With 10,148 housing units across 5.8 square miles, 08638 has a housing density of 1,750 units per square mile. The home price-to-income ratio is 3.5x.
Location & Geography
Latitude
40.2540°
Longitude
-74.7634°
Land Area
5.8 sq mi
Water Area
0 sq mi
Nearby Zip Codes
Zip codes closest to 08638 (Trenton, NJ) with distances:
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ZIP Codes with Similar Income Nationwide
The five U.S. ZIP codes whose median household income is closest to 08638's $65,650. A way to compare Trenton to economically similar communities elsewhere in the country.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
ZIP Codes with Similar Demographics
The five U.S. ZIP codes whose racial and ethnic composition most closely matches 08638 (Trenton, NJ). Similarity is measured by cosine distance on the five-category ACS demographic vector.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
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People Also Ask
What zip code is Trenton, New Jersey?
Trenton, New Jersey uses zip code 08638.
What county is zip code 08638 in?
Zip code 08638 is located in Mercer County, New Jersey.
What is the population of zip code 08638?
The population of zip code 08638 is 23,373 with a median age of 35.8.
Is 08638 in Trenton, New Jersey?
Yes, zip code 08638 is in Trenton, Mercer County, New Jersey. The area code is 609.
Frequently Asked Questions
What city is zip code 08638 in?
Zip code 08638 is in Trenton, New Jersey. It is part of Mercer County and uses the Eastern (EST/EDT) timezone.
What is zip code 08638?
Zip code 08638 is a U.S. postal code in Trenton, New Jersey (Mercer County). It has a population of 23,373 and covers 5.8 square miles.
What is the population of zip code 08638?
The population of zip code 08638 (Trenton, NJ) is 23,373 with a median age of 35.8. There are approximately 10,148 housing units in this area.
What is the median income in zip code 08638?
The median household income in zip code 08638 (Trenton, NJ) is $65,650 per year. The cost of living index is 80 (100 = national average).
What is the average home price in zip code 08638?
The median home value in zip code 08638 (Trenton, NJ) is $226,700. The cost of living index is 80 compared to the national average of 100.
What county is zip code 08638 in?
Zip code 08638 is located in Mercer County, New Jersey. The primary city is Trenton.
What is the area code for zip code 08638?
Zip code 08638 in Trenton, NJ uses area code 609. It is located in the Eastern (EST/EDT) timezone.
Is zip code 08638 a good place to live?
Zip code 08638 (Trenton, NJ) has a cost of living index of 80 (100 = national average), a median household income of $65,650, and median home values of $226,700. The median age is 35.8. Visit the full page for demographics, climate, and nearby zip code comparisons.
What is the cost of living in zip code 08638?
The cost of living index for zip code 08638 (Trenton, NJ) is 80, where 100 represents the national average. This area is below the national average. Median home value: $226,700.
What schools serve zip code 08638?
Zip code 08638 in Trenton, New Jersey is served by the local school district of Mercer County. For specific school information, check your state's department of education or GreatSchools.org.
All demographic data on this page is sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code boundary and delivery data is sourced from the United States Postal Service (USPS). Data is updated periodically and may not reflect the most current figures. Census Bureau ZIP Code Tabulation Areas (ZCTAs) may differ slightly from USPS ZIP code boundaries.
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Data Sources
- Population, income, housing, age, and demographics
- U.S. Census Bureau, American Community Survey 5-Year Estimates, 2019-2023 vintage.
- ZIP to city and county mapping
- USPS and HUD-USPS ZIP-County Crosswalk.
- Time zones and area codes
- IANA tz database and NANPA.
- Elevation
- U.S. Geological Survey National Elevation Dataset (NED), via the USGS Elevation Point Query Service. Mapped to each ZCTA centroid coordinates. Last refreshed 2026-05-19.
- Last refreshed
- 2026-05-18.