Area Code 609
New Jersey
Area code 609 serves New Jersey, primarily Trenton, in the Eastern Time (ET) time zone. It has served the region since 01-Jan-1957.
Published: Verified against NANPA and FCC records
Overlay Area Code
This area code shares its geographic footprint with an overlay code, so the same cities are served by two area codes. Because overlays leave existing numbers untouched, this region's relief planning favors adding codes over redrawing boundaries.
The codes serving this same region: area code 640 (Trenton).
With prefix utilization already at 97.5%, numbering resources here are under sustained pressure — context that explains why overlays were introduced.
In service since: 01-Jan-1957
Area Code Splits
One area code has been carved out of this code's original territory through a geographic split. Each split was a relief action: as demand grew, part of the region was reassigned to a new code rather than overlaying the whole territory.
Split into: area code 856 (Camden).
Demographics & Economics
- Total Population
- 1,514,367
- Population Density
- 760 people/sq miabove U.S. average (U.S.: 95 people/sq mi)
- Median Household Income
- $100,645above U.S. median (U.S.: $80,734)
- Poverty Rate
- 9.4%below U.S. average (U.S.: 12.5%)
- Unemployment Rate
- 6.3%above U.S. average (U.S.: 5.2%)
- Education Attainment
- Bachelor's Degree+41.5%above U.S. average (U.S.: 35.7%)High School or Lower30.6%
Statistics are population-weighted aggregations from Census ACS 5-year estimates. Population figures are approximate — see Sources & Methodology for details on how area code populations are derived.
See how this area code compares to all US area codes in the income ranking and density ranking.
Time Zone
- Eastern Time (ET)
NANPA Relief Status
According to the latest NANPA analysis (July 2026), this area code is not currently listed as exhausting within the next 36 months. No relief planning is in progress for this NPA.
Source: NANPA NPA Relief Planning Reports · See all relief planning statuses
Current Time
Prefix Utilization
Geographic Coverage
State
NJ
Major Cities
- Trenton
- Atlantic City
- Princeton
- Pleasantville
- Ocean Acres
- Princeton Meadows
- Hammonton
- Mercerville
- Hamilton Square
- Somers Point
- White Horse
- Burlington
- Villas
- Browns Mills
- Monmouth Junction
- Smithville
- Absecon
- Northfield
- Twin Rivers
- Pomona
- Fort Dix
- Brigantine
- Mystic Island
- Linwood
and 128 more cities
Demographics
The estimated population served by area code 609 is approximately 1,514,367. The population density is 760 people per square mile, which is higher than the national average of 95. The median household income is $100,645, which is higher than the national median of $80,734. Approximately 41.5% of adults hold a bachelor's degree or higher, compared to the national rate of 35.7%. This rate is higher than the national average. The poverty rate stands at 9.4%, which is lower than the national rate of 12.5%.
History
Area code 609 was established in 1957 as a geographic area code. Over time, area code area code 856 was split from 609. It shares its territory with area code area code 640.
County Coverage
Population-weighted county share based on aggregated ZCTA population (100% = total mapped population for area code 609).
| County | Population | Share |
|---|---|---|
| Mercer, NJ | 428,148 | 28.3% |
| Burlington, NJ | 358,094 | 23.6% |
| Atlantic, NJ | 267,785 | 17.7% |
| Ocean, NJ | 131,737 | 8.7% |
| Cape May, NJ | 96,045 | 6.3% |
| Middlesex, NJ | 82,899 | 5.5% |
| Somerset, NJ | 62,447 | 4.1% |
| Monmouth, NJ | 34,933 | 2.3% |
| Camden, NJ | 23,385 | 1.5% |
| Hunterdon, NJ | 20,655 | 1.4% |
| Cumberland, NJ | 8,239 | 0.5% |
Area Code 609 Family Tree
Hover over nodes to see details. Click to navigate to individual area code pages. Use scroll to zoom, drag to pan.
Area code 609 was originally assigned in 01-Jan-1957 to serve NJ. Over the years, it has generated 2 descendant area codes through a combination of geographic splits and overlays as demand for telephone numbers grew.
Call Context
This area code covers a metropolitan region in NJ with moderate to high population density, centered on Trenton and surrounding communities.
Nearby Area Codes
Area codes geographically closest to 609.
Other Area Codes in New Jersey
Area codes that also serve New Jersey, linked for easy comparison.