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Parish · code 22051

Jefferson ParishLouisiana

Jefferson Parish is a parish in Louisiana, with its seat in Gretna. It was formed on February 11, 1825, from Orleans and other parishes and named after Thomas Jefferson.

  • Founded1825
  • County seatGretna
  • Named forThomas Jefferson
  • Land area301 sq mi + 341 sq mi water
  • Population440,781 2020 Census
  • Parcels mapped155,105 checked 16 October 2026
Open the free map Click any parcel in Jefferson Parish: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

St. CharlesLafourcheOrleansSt. John the BaptistPlaqueminesSt. Tammany Gretna Census outline · seat marked

Where it is

Jefferson on the map of Louisiana

Louisiana has 64 counties and county equivalents, each with its own records office. Shapes with a page are links.

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Counties of Louisiana · Jefferson highlighted

History

Formed in 1825 from Orleans Parish, Lafourche Interior Parish, Lafourche Parish and St. Charles Parish

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

Jefferson Parish was formed in 1825 from Orleans Parish, Lafourche Interior Parish, Lafourche Parish and St. Charles Parish, and named after Thomas Jefferson. Gretna is the county seat.

Deeds and plats from before 1825 for land now in Jefferson Parish may have been recorded in Orleans Parish, Lafourche Interior Parish, Lafourche Parish and St. Charles Parish.

Boundary changes from the Newberry Library, Atlas of Historical County Boundaries; the 5 that matter most are shown first.

  1. 1825
    Jefferson Parish created Jefferson created from Orleans; included the disputed areas of Grand Isle and Cheniere Caminada. As with Orleans before it, the western line of Jefferson only vaguely defined resulting in a series of disputes and uncertainties between Jefferson and Lafourche Interior (now Lafourche), and Jefferson and St. Charles.
    from Orleansfrom Lafourche Interiorfrom Lafourchefrom St. Charles
    · La. Acts 1825, 7th Leg., 1st sess., pp. 108-112; La. Rpts. 206, pp. 616-642
  2. 1827
    Gained territory Jefferson gained officially gained jurisdiction of the disputed Grand Isle from La Fourche Interior (now Lafourche).
    from La Fourche Interiorfrom Lafourche
    · La. Acts 1827, 8th Leg., 1st sess., p. 156; La. Rpts. 206, pp. 616-642
  3. 1830
    Gained territory Jefferson officially gained jurisdiction over the Cheniere Caminada Peninsula. Though this technically eliminated the dispute between Jefferson and Lafourche Interior (now Lafourche), the competing claims to the Cheniere Caminada Peninsula and Grand Isle were not fully settled until 26 June 1944 when the Louisiana Supreme Court ruled in favor of Jefferson.
    from Lafourche Interiorfrom Lafourche
    · La. Acts 1830, 9th Leg., 2nd sess., p. 64; La. Rpts. 206, pp. 616-642
  4. 1870
    Lost territory Jefferson lost to Orleans when the cities of New Orleans and Jefferson were consolidated.
    to Orleans
    · La. Acts 1870, 1st Leg., extra sess., pp. 30-49
  5. 1874
    Lost territory Jefferson lost to Orleans when the city of Carrollton was annexed to the City of New Orleans.
    to Orleans
    · La. Acts 1874, 3rd Leg., 2nd sess., pp. 119-122
Show all 12 changes (7 more, mostly small adjustments)
  1. 1825
    Jefferson Parish created Jefferson created from Orleans; included the disputed areas of Grand Isle and Cheniere Caminada. As with Orleans before it, the western line of Jefferson only vaguely defined resulting in a series of disputes and uncertainties between Jefferson and Lafourche Interior (now Lafourche), and Jefferson and St. Charles.
    from Orleansfrom Lafourche Interiorfrom Lafourchefrom St. Charles
    · La. Acts 1825, 7th Leg., 1st sess., pp. 108-112; La. Rpts. 206, pp. 616-642
  2. 1827
    Gained territory Jefferson gained officially gained jurisdiction of the disputed Grand Isle from La Fourche Interior (now Lafourche).
    from La Fourche Interiorfrom Lafourche
    · La. Acts 1827, 8th Leg., 1st sess., p. 156; La. Rpts. 206, pp. 616-642
  3. 1830
    Gained territory Jefferson officially gained jurisdiction over the Cheniere Caminada Peninsula. Though this technically eliminated the dispute between Jefferson and Lafourche Interior (now Lafourche), the competing claims to the Cheniere Caminada Peninsula and Grand Isle were not fully settled until 26 June 1944 when the Louisiana Supreme Court ruled in favor of Jefferson.
    from Lafourche Interiorfrom Lafourche
    · La. Acts 1830, 9th Leg., 2nd sess., p. 64; La. Rpts. 206, pp. 616-642
  4. 1847
    Lost territory Jefferson lost small area to Orleans when the limits of Orleans were extended to "all that portion of Felicity Road from Levee street to the rear of the city, lying between the center of said street, and to the line of the second Municipality of New Orleans, on the north side of the same, which ground is within the limits of the city of LaFayette, parish of Jefferson."
    to Orleans
    · La. Acts 1847, 1st Leg., 2nd sess., pp. 100-101
  5. 1850
    Boundary clarified Jefferson boundary with Orleans redefined (no change)
    with Orleansno change
    · La. Acts 1850, 3rd. Leg., pp. 243-244
  6. 1852
    Changed City of New Orleans annexed the independent municipality of LaFayette, extending the limits of New Orleans upriver as far as Toledano Street and into Jefferson Parish. The act of annexation stipulated that the 1847 line along Felicity Street was to remain the boundary between the parishes of Orleans and Jefferson (no change).
    Orleans
    · Swanson, 47-48, 100-101
  7. 1870
    Lost territory Jefferson lost to Orleans when the cities of New Orleans and Jefferson were consolidated.
    to Orleans
    · La. Acts 1870, 1st Leg., extra sess., pp. 30-49
  8. 1874
    Lost territory Jefferson lost to Orleans when the city of Carrollton was annexed to the City of New Orleans.
    to Orleans
    · La. Acts 1874, 3rd Leg., 2nd sess., pp. 119-122
  9. c. 1952
    Gained territory Jefferson gained Couba Island, and parts of Lake Cataouatche and Lake Salvador. Vague descriptions given in acts creating and changing Jefferson resulted in multiple interpretations of the Jefferson boundary as it ran around, or through Lake Cataouatche, Lake Salvador, and Caminada Bay. Court actions in the 1940s settled parts of this boundary, and by 1952 U.S.G.S. maps showed the Jefferson boundary running to the west of Couba Island between Lake Cataouatche and Lake Salvador.
    from U.s.g.s
    · La. Rpts. 206, pp. 616-642; Swanson, 47-48; U.S.G.S. Louisiana 7.5 Minute Series, 1944, 1952
  10. 1954
    Changed Jefferson boundary extended three marine leagues into the Gulf of Mexico making the parish boundary coextensive with the gulfward boundary of the State of Louisiana. Act passed 21 June 1954, became effective 30 July 1954. · La. Acts 1954, reg. sess., pp. 62-63
  11. c. 1954
    Lost territory Jefferson lost Couba Island and parts of Lake Cataouatche and Lake Salvador to St. Charles.
    to St. Charles
    · U.S.G.S. Louisiana 7.5 Minute Series, 1954, 1966
  12. 1979
    Gained territory Jefferson gained when boundaries through Lake Pontchartrain were defined. · La. Acts 1979, vol. 2, reg. sess., pp. 2042, 2054-2056

Land and parcels

What the maps cover in Jefferson

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

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

Jefferson by the Census

Population
440,781 2020 Census count
Housing units
193,878 2020 Census count
Land area
301 square miles
Water area
341 square miles · 53% of the county, including large bodies of water
People per sq mi
1,465 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

Jefferson Parish's official site

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

County government

See your own lot on these maps

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Questions

Common questions about Jefferson Parish

When was Jefferson Parish founded?
Jefferson Parish was founded in 1825, formed from Orleans Parish, Lafourche Interior Parish, Lafourche Parish and St. Charles Parish, and named after Thomas Jefferson.
What is the county seat of Jefferson Parish?
The county seat of Jefferson Parish is Gretna.
Is there an online parcel map for Jefferson Parish?
Yes. Jefferson Parish publishes a parcel map of 155,105 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Jefferson Parish's boundary or name changed?
Jefferson Parish was created in 1825 from Orleans Parish, Lafourche Interior Parish, Lafourche Parish and St. Charles Parish. Since then the Atlas of Historical County Boundaries records 9 later changes, chiefly involving Orleans Parish, Lafourche Parish and La Fourche Interior Parish.
Is my lot in a flood zone?
We do not have flood maps for Jefferson Parish yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

Nearby

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