When was Hudson County founded?

Hudson County was founded in 1840, formed from Bergen County, and named after Henry Hudson.

What is the county seat of Hudson County?

The county seat of Hudson County is Jersey City.

Is there an online parcel map for Hudson County?

Yes. A public source publishes a parcel map of 147,522 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.

Has Hudson County's boundary or name changed?

Hudson County was created in 1840 from Bergen County. Since then the Atlas of Historical County Boundaries records 1 later change, chiefly involving Bergen County.

Is my lot in a flood zone?

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

County · code 34017

Hudson CountyNew Jersey

Hudson County is located in New Jersey and was formed on February 22, 1840, with Jersey City as its county seat.

Founded1840
County seatJersey City
Named forHenry Hudson
Land area46 sq mi + 16 sq mi water
Population724,854 2020 Census
Parcels mapped147,522 checked 15 October 2026

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

Updated 19 October 2026

Census outline · seat marked

History

Formed in 1840 from Bergen County

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

Hudson County was created from Bergen County on February 22, 1840. The county was named after Henry Hudson. On February 19, 1852, Hudson County lost territory to Bergen County.

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

1840
Hudson County created Hudson created from Bergen.
from Bergen
22 February 1840 · N.J. Acts 1840, p. 65; Winfield, History of Hudson, 332; Snyder, 37-38
1852
Lost territory Hudson lost to Bergen.
to Bergen
19 February 1852 · N.J. Acts 1852, pp. 43-44; Snyder, 40
1892
Boundary clarified Water boundaries of Hudson, Bergen, Middlesex, Monmouth, and Union redefined to match the New Jersey-New York interstate boundary agreement of 1834, as detailed by joint commissions in 1887 and 1889.
with Bergen with Middlesex with Monmouth with Unionno change
9 April 1892 · N.J. Acts 1892, p. 441; Snyder, 44-45

Land and parcels

What the maps cover in Hudson

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

Parcels Good enough

Lot lines and tax-map numbers for 147,522 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, 219,780 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

Hudson by the Census

Population

724,854 2020 Census count

Housing units

312,706 2020 Census count

Land area

46 square miles

Water area

16 square miles

People per sq mi

15,693 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

Hudson 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 Hudson County.
hudsoncountynj.org

See your own lot on these maps

Open Hudson 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 Hudson County

When was Hudson County founded?: Hudson County was founded in 1840, formed from Bergen County, and named after Henry Hudson.
What is the county seat of Hudson County?: The county seat of Hudson County is Jersey City.
Is there an online parcel map for Hudson County?: Yes. A public source publishes a parcel map of 147,522 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Hudson County's boundary or name changed?: Hudson County was created in 1840 from Bergen County. Since then the Atlas of Historical County Boundaries records 1 later change, chiefly involving Bergen County.
Is my lot in a flood zone?: We do not have flood maps for Hudson County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

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