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.

Overlay Area Code

This area code is part of an overlay region, meaning the same geographic area is served by multiple area codes. Overlay codes were introduced to meet growing demand for phone numbers without requiring existing customers to change their numbers.

This area code shares its geographic region with: area code 640 (Trenton).

In service since: 01-Jan-1957

Learn more about overlay and split area codes →

Area Code Splits

Parts of this area code’s original geographic region were later assigned new area codes through splits. When a split occurs, some customers in the original area code region are assigned the new area code.

Split into: area code 856 (Camden).

Learn more about overlay and split area codes →

Demographics & Economics

Total Population: 1,514,367
Population Density: 756 people/sq mi
above U.S. average (U.S.: 93 people/sq mi)
Median Household Income: $96,333
above U.S. median (U.S.: $75,144)
Poverty Rate: 9.7%
below U.S. average (U.S.: 11.5%)
Unemployment Rate: 6.1%
above U.S. average (U.S.: 3.6%)
Education Attainment: Bachelor's Degree+
40.9%
above U.S. average (U.S.: 33.7%)
High School or Lower
30.7%

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

Eastern Time (ET)

Prefix Utilization

Geographic Coverage

State

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

Area Code 609 geographic coverage map (light mode)

Demographics

The estimated population served by area code 609 is approximately 1,514,367. The population density is 756 people per square mile, which is higher than the national average of 93. The median household income is $96,333, which is higher than the national median of $75,144. Approximately 40.9% of adults hold a bachelor's degree or higher, compared to the national rate of 33.7%. This rate is higher than the national average. The poverty rate stands at 9.7%, which is lower than the national rate of 11.5%.

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

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Total Codes

Splits

Overlays

Max Depth

All Descendants

Code ▲	State	Type	In Service	Parent
640	NJ	overlay	17-Sep-2018	609
856	NJ	split	12-Jun-1999	609

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.