When was Atlantic County founded?

Atlantic County was founded in 1837, formed from Gloucester County, and named after Atlantic Ocean.

What is the county seat of Atlantic County?

The county seat of Atlantic County is Mays Landing.

Is there an online parcel map for Atlantic County?

Yes. A public source publishes a parcel map of 174,386 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.

Has Atlantic County's boundary or name changed?

Atlantic County was created in 1837 from Gloucester County. Since then the Atlas of Historical County Boundaries records 1 later change, chiefly involving Burlington County.

Is my lot in a flood zone?

We do not have flood maps for Atlantic County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

County · code 34001

Atlantic CountyNew Jersey

Atlantic County is a county in New Jersey with its seat in Mays Landing, formed in 1837.

Founded1837
County seatMays Landing
Named forAtlantic Ocean
Land area556 sq mi + 116 sq mi water
Population274,534 2020 Census
Parcels mapped174,386 checked 15 October 2026

Open the free map Click any parcel in Atlantic County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated 19 October 2026

Census outline · seat marked

History

Formed in 1837 from Gloucester County

An old deed may name a county that no longer exists, or a boundary that has since moved.

Atlantic County was created from Gloucester County on February 7, 1837, and named after the Atlantic Ocean. The county lost land to Burlington County on April 3, 1902.

Boundary changes from the Newberry Library, Atlas of Historical County Boundaries.

1837
Atlantic County created Atlantic created from Gloucester.
from Gloucester
7 February 1837 · Lee, 4:283; N.J. Acts 1837, pp. 96-97; Snyder, 37
1902
Lost territory Atlantic lost to Burlington.
to Burlington
3 April 1902 · N.J. Acts 1902, pp. 403-404; Snyder, 45
1906
Boundary clarified Coastal limits of Atlantic, Cape May, Monmouth, and Ocean redefined.
with Cape May with Monmouth with Oceanno change
17 May 1906 · N.J. Acts 1906, p. 542; Snyder, 45
1938
Boundary clarified Boundaries between Atlantic, Camden and Gloucester redefined (no change).
with Camden with Gloucesterno change
14 May 1938 · N.J. Acts 1938, p. 386; Snyder, 47

Land and parcels

What the maps cover in Atlantic

Who publishes each layer, how good it is, and when we last checked.

Parcels Good enough

Lot lines and tax-map numbers for 174,386 parcels. Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
checked 15 October 2026
Address points Official

One point per address, 135,108 in all from NJOGIS.
edited 23 September 2026 · checked 14 October 2026
Buildings Reference

Roof outlines traced from aerial imagery from FEMA Response Geospatial Office with Oak Ridge National Laboratory (ORNL). Good for seeing what is on a lot; not accurate enough to set a fence from.
checked 18 October 2026

Official: from the office that keeps the record
Good enough: a reliable statewide or national copy
Fallback: a guide only; check the official record
Missing: nothing public found yet

People and land

Atlantic by the Census

Population

274,534 2020 Census count

Housing units

132,038 2020 Census count

Land area

556 square miles

Water area

116 square miles

People per sq mi

494 population ÷ land area

Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.

Rules and offices

Atlantic County's official site

We have found the county's site but not its offices yet; start there.

County government

County government
The official website of Atlantic County.
aclink.org

See your own lot on these maps

Open Atlantic County on Parcel Chart's free map and click your parcel. Save it with a free account; the full record of your place (site map, projects, documents) is Pro, in early access.

Open the free map no sign-in Pro early access

Questions

Common questions about Atlantic County

When was Atlantic County founded?: Atlantic County was founded in 1837, formed from Gloucester County, and named after Atlantic Ocean.
What is the county seat of Atlantic County?: The county seat of Atlantic County is Mays Landing.
Is there an online parcel map for Atlantic County?: Yes. A public source publishes a parcel map of 174,386 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Atlantic County's boundary or name changed?: Atlantic County was created in 1837 from Gloucester County. Since then the Atlas of Historical County Boundaries records 1 later change, chiefly involving Burlington County.
Is my lot in a flood zone?: We do not have flood maps for Atlantic County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

Nearby