When was Lafourche Parish founded?

Lafourche Parish was founded in 1807.

What is the county seat of Lafourche Parish?

The county seat of Lafourche Parish is Thibodaux.

Is there an online parcel map for Lafourche Parish?

Yes. A public source publishes a parcel map of 56,931 parcels, rated fallback here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.

Has Lafourche Parish's boundary or name changed?

Lafourche Parish was created in 1807. Since then the Atlas of Historical County Boundaries records 7 later changes, chiefly involving Jefferson Parish, Terrebonne Parish and Lafourche Interior Parish. It was formerly called Lafourche Interior.

Is my lot in a flood zone?

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

Parish · code 22057

Lafourche ParishLouisiana

Lafourche Parish is a parish in Louisiana, with its seat in Thibodaux, formed in 1807.

Founded1807
County seatThibodaux
Land area1,068 sq mi + 401 sq mi water
Population97,557 2020 Census
Parcels mapped56,931 checked 15 October 2026

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

Updated 19 October 2026

Census outline · seat marked

History

Founded in 1807

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

Lafourche Interior Parish was created on April 14, 1807, as a civil division that reused ecclesiastical boundaries, operating alongside the counties that had been established in 1805. The parish experienced multiple boundary changes over the next century, including losses to Terrebonne Parish in 1822, disputes over Grand Isle and the Cheniere Caminada Peninsula with Jefferson Parish that were not fully resolved until 1944, and a loss to St. James Parish in 1847. Lafourche Interior was renamed Lafourche in 1853, and in 1954 the parish boundary was extended three marine leagues into the Gulf of Mexico.

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

1807
Lafourche Parish created Lafourche Interior Parish created within Lafourche County. The nineteen parishes created on 14 April 1807 were civil divisions which reused the earlier ecclesiastical boundaries and names. The division into civil parishes did not abolish the twelve counties established on 10 April 1805. This and subsequent laws set up a dual system in which the counties existed "for the purpose of making the election of the representatives of the territory, and levying the territorial taxes", while the parishes took over jurisdiction of all civil, criminal, probate and other judicial matters. The dual county / parish system remained in effect until the state constitution of 1845. Though there was no legislative act formally abolishing the old counties, the 1845 constitution dropped all reference to the county as a civil or legislative division and redefined the limits of parish autonomy and authority. 14 April 1807 · Orleans Terr. Acts 1807, 1st. Leg., 2nd sess., ch. 1, sec. 9/ p. 12; Calhoun, 85-93
1822
Lost territory Lafourche Interior (now Lafourche) lost to creation of Terrebonne.
to Terrebonne
22 March 1822 · La. Acts 1822, 5th Leg., 2nd sess., pp. 74-76
1827
Lost territory Lafourche Interior (now Lafourche) officially lost jurisdiction over the disputed Grand Isle to Jefferson.
to Jefferson
22 March 1827 · La. Acts 1827, 8th Leg., 1st sess., p. 156
1830
Lost territory Lafourche Interior (now Lafourche) officially lost jurisdiction over the Cheniere Caminada Peninsula to Jefferson. Though this technically eliminated the dispute between Jefferson and Lafourche Interior (now Lafourche), the competing claims to Cheniere Caminada and Grand Isle were not fully settled until 26 June 1944 when the Louisiana Supreme Court ruled in favor of Jefferson.
to Jefferson
15 March 1830 · La. Acts 1830, 9th Leg., 2nd sess., p. 64
1853
Renamed Lafourche Interior renamed Lafourche.
formerly Lafourche Interior
23 March 1853 · La. Acts 1853, 1st Leg., p. 42

Show all 10 changes (5 more, mostly small adjustments)

1807
Lafourche Parish created Lafourche Interior Parish created within Lafourche County. The nineteen parishes created on 14 April 1807 were civil divisions which reused the earlier ecclesiastical boundaries and names. The division into civil parishes did not abolish the twelve counties established on 10 April 1805. This and subsequent laws set up a dual system in which the counties existed "for the purpose of making the election of the representatives of the territory, and levying the territorial taxes", while the parishes took over jurisdiction of all civil, criminal, probate and other judicial matters. The dual county / parish system remained in effect until the state constitution of 1845. Though there was no legislative act formally abolishing the old counties, the 1845 constitution dropped all reference to the county as a civil or legislative division and redefined the limits of parish autonomy and authority. 14 April 1807 · Orleans Terr. Acts 1807, 1st. Leg., 2nd sess., ch. 1, sec. 9/ p. 12; Calhoun, 85-93
1822
Lost territory Lafourche Interior (now Lafourche) lost to creation of Terrebonne.
to Terrebonne
22 March 1822 · La. Acts 1822, 5th Leg., 2nd sess., pp. 74-76
1824
Gained territory Lafourche Interior (now Lafourche) gained Grand Isle, and implicitly gained jurisdiction over the Cheniere Caminada Peninsula from Orleans when Lafourche Interior boundary was defined. Uncertainty over the relative locations of Grand Isle and the Cheniere Caminada Peninsula resulted in a long-standing dispute over the area. Boundary between Lafourche Interior and Assumption defined (no change).
from Orleans from Assumption
7 March 1824 · La. Acts 1824, 6th Leg., 2nd sess., p. 68
1827
Lost territory Lafourche Interior (now Lafourche) officially lost jurisdiction over the disputed Grand Isle to Jefferson.
to Jefferson
22 March 1827 · La. Acts 1827, 8th Leg., 1st sess., p. 156
1830
Lost territory Lafourche Interior (now Lafourche) officially lost jurisdiction over the Cheniere Caminada Peninsula to Jefferson. Though this technically eliminated the dispute between Jefferson and Lafourche Interior (now Lafourche), the competing claims to Cheniere Caminada and Grand Isle were not fully settled until 26 June 1944 when the Louisiana Supreme Court ruled in favor of Jefferson.
to Jefferson
15 March 1830 · La. Acts 1830, 9th Leg., 2nd sess., p. 64
1847
Lost territory Lafourche Interior (now Lafourche) lost to St. James.
to St. James
28 April 1847 · La. Acts 1847, 1st Leg., 2nd sess., pp. 134-135
1850
Gained territory Lafourche Interior (now Lafourche) gained from Terrebonne.
from Terrebonne
13 March 1850 · La. Acts 1850, 3rd Leg., p. 68
1853
Renamed Lafourche Interior renamed Lafourche.
formerly Lafourche Interior
23 March 1853 · La. Acts 1853, 1st Leg., p. 42
1954
Changed Lafourche 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. 30 July 1954 · La. Acts 1954, reg. sess., pp. 62-63
1966
Changed Lafourche boundary with Terrebonne, from the intersection of Bayou Pointe au Chien and Grand Bayou Felicity south to the Gulf of Mexico, was defined (no change).
Terrebonne
27 July 1966 · La. Acts 1966, reg. sess., pp. 240-244

Land and parcels

What the maps cover in Lafourche

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

Parcels Fallback

Lot lines and tax-map numbers for 56,931 parcels. Drawn for tax purposes: usually within a few feet of a survey, but not a survey. This copy is a fallback, not the county's own: use it as a guide and check the official record.
edited 29 September 2021 · checked 15 October 2026
Address points Missing

No public address points layer found for Lafourche Parish yet.
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

Lafourche by the Census

Population

97,557 2020 Census count

Housing units

40,933 2020 Census count

Land area

1,068 square miles

Water area

401 square miles

People per sq mi

91 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

Lafourche Parish'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 Lafourche Parish.
lafourchegov.org

See your own lot on these maps

Open Lafourche Parish 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 Lafourche Parish

When was Lafourche Parish founded?: Lafourche Parish was founded in 1807.
What is the county seat of Lafourche Parish?: The county seat of Lafourche Parish is Thibodaux.
Is there an online parcel map for Lafourche Parish?: Yes. A public source publishes a parcel map of 56,931 parcels, rated fallback here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Lafourche Parish's boundary or name changed?: Lafourche Parish was created in 1807. Since then the Atlas of Historical County Boundaries records 7 later changes, chiefly involving Jefferson Parish, Terrebonne Parish and Lafourche Interior Parish. It was formerly called Lafourche Interior.
Is my lot in a flood zone?: We do not have flood maps for Lafourche Parish 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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