• parish
  • FIPS 22099
  • Largest town: Breaux Bridge

St. Martin Parish, Louisiana

St. Martin Parish had 51,218 residents in the Census Vintage 2024 estimate, on 737.6 square miles of land. It ranks 20th of 64 in Louisiana by population and 25th by land area.

Population
51,218
#20 of 64 in Louisiana · #993 in US
Area
737.6 sq mi
#25 of 64 in Louisiana · #1,199 in US
Density
69 / sq mi
#26 of 64 in Louisiana · #1,188 in US
Median household income
$54,516
#26 of 64 in Louisiana · #2,366 in US

Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area

St. Martin Parish within Louisiana. Pin: Baton Rouge.

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Tools and pages that start from St. Martin Parish

St. Martin Parish population, land area and income

St. Martin Parish had 51,218 residents in the Census Vintage 2024 estimate, on 737.6 square miles of land. It ranks 20th of 64 in Louisiana by population and 25th by land area. That works out to 69.4 people per square mile, below the US average of 96.3, and above the national county median.

The median county-equivalent in Louisiana has 31,591 residents; St. Martin Parish is somewhat larger.

Its SAIPE 2023 median household income of $54,516 is in the bottom quarter among 3,143 counties with an estimate.

National rank among 3,144

Population

51,218

3144th1st

993rd of 3,144 (US)

Land area

738 sq mi

3144th1st

1199th of 3,144 (US)

Density

69.4 / sq mi

3144th1st

1188th of 3,144 (US)

Median household income

$54,516

3143rd1st

2366th of 3,143 (US)

Rank within Louisiana (64)

Population

51,218

64th1st

20th of 64 (LA)

Land area

738 sq mi

64th1st

25th of 64 (LA)

Density

69.4 / sq mi

64th1st

26th of 64 (LA)

Median household income

$54,516

64th1st

26th of 64 (LA)

How St. Martin Parish's population changed since 2020

St. Martin Parish lost 396 residents between the July 2020 and July 2024 estimates, a drop of 0.8%. That ranks 18th of 64 in Louisiana for growth. The median Louisiana county changed by -2.3%, and the state as a whole by -1.2%.

Since the April 2020 estimates base, St. Martin Parish recorded 2,769 births and 2,691 deaths, a natural change of +78. Net international migration added +284 and net domestic migration, people moving to or from other US counties, came to -902. The largest single component was domestic migration, which removed 902 people.

51.6k202051.6k202151.3k202251.1k202351.2k2024
Census Vintage 2024 county estimates for July 1 of each year. The axis starts above zero so year-to-year changes are visible.

Components of change, April 2020 to July 2024

Births
2,769
Deaths
2,691
Net international migration
+284
Net domestic migration
-902
Change, July 2023 to July 2024
+96

Where St. Martin Parish is

The Census internal point of St. Martin Parish is at 30.121400, -91.611500. It sits in UTM zone 15N. The map shades Louisiana's 64 county-equivalents by population change from 2020 to 2024, darker for faster growth, with St. Martin Parish outlined. Dots are towns of 1,000+ people with residents in it.

Assumption Parish: -4.4%Concordia Parish: -4.2%Jackson Parish: -1.3%De Soto Parish: +1.6%Washington Parish: -0.6%Bienville Parish: -3.9%Caddo Parish: -5.1%Red River Parish: -4.6%Lafayette Parish: +5.0%Webster Parish: -4.6%Calcasieu Parish: -4.4%Allen Parish: -0.8%Rapides Parish: -2.9%Vernon Parish: -5.8%Union Parish: -2.3%St. Tammany Parish: +4.8%West Baton Rouge Parish: +4.3%Winn Parish: -2.3%Beauregard Parish: +0.2%Grant Parish: -0.2%Evangeline Parish: -1.7%Tangipahoa Parish: +4.6%St. Martin Parish: -0.8%Tensas Parish: -6.4%Caldwell Parish: -2.3%Franklin Parish: -3.1%Jefferson Parish: -2.8%Madison Parish: -8.3%Morehouse Parish: -6.6%Jefferson Davis Parish: -2.4%Pointe Coupee Parish: -4.0%Bossier Parish: +1.8%Richland Parish: -1.9%St. Charles Parish: -4.0%Acadia Parish: -1.5%Avoyelles Parish: -3.2%St. Mary Parish: -4.8%East Baton Rouge Parish: -0.6%Lafourche Parish: -2.2%Cameron Parish: -16.8%Terrebonne Parish: -5.1%LaSalle Parish: -0.9%Livingston Parish: +7.0%St. John the Baptist Parish: -6.3%Ouachita Parish: -1.4%Claiborne Parish: -4.0%St. Bernard Parish: +2.1%Orleans Parish: -5.4%St. Landry Parish: -1.8%Plaquemines Parish: -5.0%East Carroll Parish: -6.8%Vermilion Parish: +1.2%East Feliciana Parish: -1.7%Sabine Parish: -1.6%Iberia Parish: -3.6%Ascension Parish: +5.2%Lincoln Parish: -0.1%Natchitoches Parish: -3.8%St. James Parish: -5.0%St. Helena Parish: -0.4%Catahoula Parish: -6.4%West Carroll Parish: -4.5%West Feliciana Parish: -0.7%Iberville Parish: -1.0%
Change 2020 to 2024
  1. < -5.0%
  2. < -3.6%
  3. < -1.7%
  4. < -0.4%
  5. ≥ -0.4%
no data

Orange pin: St. Martin Parish internal point. Dark pin: Baton Rouge.

Internal point

Decimal
30.121400, -91.611500
DMS
30°07'17.04"N 91°36'41.40"W
UTM
15N 633760.9E 3333051.0N
Geohash
9vqg776tc
Plus code
862C49CQ+HC

Towns in St. Martin Parish

4 incorporated places of 1,000+ people have residents in St. Martin Parish, 14,619 people together, or 29% of the county. Each figure counts only the part of the town inside St. Martin Parish; towns marked "part" extend into another county. The largest is Breaux Bridge with 7,582.

  1. 01Breaux Bridge7,582
  2. 02St. Martinville5,229
  3. 03Henderson1,605
  4. 04Broussard (part)203
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering St. Martin Parish

The Census 2024 county adjacency file lists 7 neighbors for St. Martin Parish. The most populous is Lafayette Parish, LA, with 254,241 residents. Distances run between Census internal points in a straight line.

Distance to Baton Rouge and the nearest big city

Baton Rouge is 34.3 miles NE of St. Martin Parish's internal point in a straight line. The nearest place of 100,000 or more is Lafayette, LA (population 122,280), 25.5 miles away. The nearest place of 10,000 or more is New Iberia, LA (population 26,849), 14.9 miles away.

St. Martin Parish FIPS code

The FIPS code of St. Martin Parish is 22099: state code 22 for Louisiana plus parish code 099. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $54,516.

Questions people ask

What is the population of St. Martin Parish, Louisiana?

The Census Vintage 2024 estimate for July 1, 2024 is 51,218. That is down 396 people (0.8%) from the July 2020 estimate of 51,614.

What is the FIPS code of St. Martin Parish?

22099. The first two digits (22) are Louisiana; the last three (099) identify the parish.

What is the largest town in St. Martin Parish?

Breaux Bridge, with 7,582 residents inside St. Martin Parish in 2024.

Which counties border St. Martin Parish?

7 county-equivalents border it in the Census 2024 adjacency file: Lafayette Parish, LA; St. Landry Parish, LA; Iberia Parish, LA; St. Mary Parish, LA; Iberville Parish, LA; Assumption Parish, LA; Pointe Coupee Parish, LA.

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 county adjacency file
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.