County · Louisiana

St. Martin Parish, Louisiana

St. Martin Parish, Louisiana. St. Martin Parish had 51,106 residents in 2025 by the Census Bureau's estimate, down 1.2% since 2020, in line with Louisiana (−0.9%). It holds 10 places (7 cities, villages and boroughs and 3 census-designated) and 17 census tracts. GEOID 22099.

St. Martin Parish is one of the 4 counties of the Lafayette, LA metropolitan statistical area (the Census Bureau's July 2023 delineation).

Residents, July 2025 estimate

51,106

Census Bureau estimate (no margin published)
2020 Census count: 51,767 · ACS 2020-2024: 51,353

Median household income

$55,960

±$5,042 (90% margin)
Louisiana: $60,756

Median home value

$164,200

±$6,482 (90% margin)
Louisiana: $216,500

Median gross rent

$870

±$50 (90% margin)
Louisiana: $1,064

How many people live in St. Martin Parish, and is it growing?

The 2020 Census counted 51,767 residents in St. Martin Parish. The Census Bureau estimates 51,106 for July 1, 2025, down 1.2% since 2020, in line with Louisiana (−0.9%). The 2020-2024 American Community Survey puts the population at 51,353 over 738 square miles of land.

July 2020→2021 −45 (51,571)
2021→2022 −264 (51,307)
2022→2023 −156 (51,151)
2023→2024 +150 (51,301)
2024→2025 −195 (51,106)

St. Martin Parish in Louisiana. Boundaries: Census Bureau 2024.

Counts, ACS 2020-2024 5-year estimates, with the change from 2015-2019
Measure	St. Martin Parish	Louisiana	Change since 2015-2019
Total population	51,353	4,611,961	−2,379
Households	19,579±478	1,804,780	no clear change
Average household size	2.61±0.06	2.49	−0.10
Housing units	23,828±38	2,108,902	+444

St. Martin Parish's population since 2000

From 48,583 in 2000 to 51,106 in 2025: up 5.2%. The 2000, 2010 and 2020 figures are census counts. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.

2000 Census 48,583
2005 (estimate) 49,890
2010 Census 52,160
2015 (estimate) 53,891
2020 Census 51,767
2025 (estimate) 51,106

Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); PEP Vintage 2025 (CO-EST2025); 2020 Census · Check it at data.census.gov

What cities and towns are in St. Martin Parish?

St. Martin Parish holds 10 places: 7 cities, villages and boroughs (incorporated places) and 3 census-designated places. The largest is Breaux Bridge with 7,652 residents (2025 estimate). Places that cross a county line are listed with the share of their 2020 residents who live in this county.

Places in St. Martin Parish, ACS 2020-2024 5-year estimates. Ring: estimate with a coefficient of variation over 40%.

Breaux Bridge	city	7,513	7,501±27	$47,806	$175,900	30.4%	100%
St. Martinville	city	5,379	5,297±21	$36,130	$100,100	22.3%	100%
CadeGEOID 2211580	CDP	1,874	1,710±470	$72,839	$204,900	6.0%	100%
CeciliaGEOID 2213575	CDP	1,807	1,742±686	$67,109	not published	22.6%	100%
Henderson	town	1,617	1,779±315	$48,750	$93,800	12.9%	100%
CatahoulaGEOID 2213330	CDP	988	594±226	$44,539	$151,600	31.8%	100%
Parks	village	640	963±406	$86,458	$152,600	8.6%	100%
Broussard	city	13,417	14,322±180	$116,179	$310,200	13.4%	1%
ArnaudvilleGEOID 2203110	town	1,009	1,239±549	$16,111	$83,400	67.1%	4%
Morgan City	city	11,472	11,064±42	$56,474	$155,200	17.4%	0%

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 place-by-county parts · Check it at data.census.gov

Who lives in St. Martin Parish?

The median resident of St. Martin Parish is 40.1 years old; 24.0% are under 18 and 17.2% are 65 or older. The largest group is non-Hispanic white residents at 63.1%, then non-Hispanic Black residents at 28.6%. 1.8% of residents were born outside the United States.

Age, origin and education, ACS 2020-2024 5-year estimates. Race groups are non-Hispanic; Hispanic includes any race.
Measure	St. Martin Parish	Louisiana	Change since 2015-2019
Median age	40.1±0.6	38.0	+2.4
Under 18 years	24.0%±0.1 pts	23.5%	–
65 years and over	17.2%±0.1 pts	16.7%	–
Hispanic or Latino (any race)	3.6%	7.2%	+0.6 pts
White alone, not Hispanic	63.1%±0.6 pts	55.7%	−1.2 pts
Black or African American alone, not Hispanic	28.6%±0.6 pts	30.5%	no clear change
Asian alone, not Hispanic	0.8%±0.2 pts	1.7%	no clear change
American Indian and Alaska Native alone, not Hispanic	0.2%±0.1 pts	0.4%	–
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0.1%±0.2 pts	0.1%	–
Two or more races, not Hispanic	3.3%±0.8 pts	3.8%	–
Some other race alone, not Hispanic	0.3%±0.3 pts	0.5%	–
Born outside the United States	1.8%±0.5 pts	4.9%	no clear change
Speak a language other than English at home (age 5+)	10.6%±1.2 pts	8.5%	–
Civilian veterans (age 18+)	5.4%±0.9 pts	6.1%	–
With a disability	16.1%±1.2 pts	16.3%	–
No health insurance coverage	6.1%±1.3 pts	7.8%	−5.0 pts
High school graduate or higher (age 25+)	83.2%±1.9 pts	87.3%	–
Bachelor's degree or higher (age 25+)	16.8%±1.9 pts	27.0%	no clear change
Graduate or professional degree (age 25+)	4.4%±0.8 pts	10.1%	–
Moved from another state in the past year	1.3%±0.9 pts	1.6%	–

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov

What do households in St. Martin Parish earn?

Half of St. Martin Parish's 19,579 households earn less than $55,960 a year (±$5,042), against $60,756 in Louisiana. In 2015-2019 it was $59,881 in 2024 dollars; the margins of error cannot tell the two periods apart. 15.3% of residents live below the poverty line.

Income and poverty in 2024 dollars, ACS 2020-2024 5-year estimates
Measure	St. Martin Parish	Louisiana	Change since 2015-2019
Median household income	$55,960±$5,042	$60,756	no clear change
Mean household income	$77,235±$4,204	$87,038	–
Per capita income	$31,041±$1,634	$35,038	no clear change
People below the poverty line	15.3%±1.9 pts	18.9%	−3.6 pts
Children under 18 below the poverty line	17.7%±3.3 pts	25.4%	−10.7 pts
Households receiving SNAP	20.4%±2.7 pts	17.3%	–
Households with a broadband subscription	83.2%±2.0 pts	86.6%	–

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov

What does housing cost in St. Martin Parish?

Owners occupy 77.7% of St. Martin Parish's occupied homes and renters 22.3%. The median owner-occupied home is valued at $164,200 by its owner (±$6,482). The median renter pays $870 a month including utilities, and 40.7% of renters pay 35% or more of their income on rent.

Housing, ACS 2020-2024 5-year estimates
Measure	St. Martin Parish	Louisiana	Change since 2015-2019
Median home value (owner-occupied)	$164,200±$6,482	$216,500	no clear change
Median gross rent	$870±$50	$1,064	no clear change
Renters paying 35% or more of income on rent	40.7%±5.7 pts	46.3%	no clear change
Median monthly owner costs, with a mortgage	$1,430±$69	$1,604	–
Owner-occupied homes	77.7%±2.8 pts	67.4%	no clear change
Housing units	23,828±38	2,108,902	+444
Homeowner vacancy rate	1.3%±0.7 pts	1.3%	–
Rental vacancy rate	4.7%±3.0 pts	7.8%	–
Single-family detached homes	70.1%±2.6 pts	65.3%	–
Mobile homes	24.8%±2.4 pts	12.6%	–
Built 2020 or later	2.3%±0.6 pts	1.8%	–
Built 1939 or earlier	4.0%±0.9 pts	6.1%	–

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov

How many new homes is St. Martin Parish building?

Builders took permits for 50 new housing units across St. Martin Parish in 2025 (50 single-family), 1.0 per 1,000 residents.

2019 173 units
2020 72 units
2021 114 units
2022 66 units
2023 46 units
2024 55 units
2025 50 units

Source: Building Permits Survey, annual county files 2019-2025, U.S. Census Bureau · Census Building Permits Survey

How do people in St. Martin Parish get to work?

82.8% of St. Martin Parish's workers drive alone and 8.1% work from home. The average trip to work takes 27.2 minutes. The unemployment rate in 2020-2024 averaged 4.0%.

Work and commuting, ACS 2020-2024 5-year estimates
Measure	St. Martin Parish	Louisiana	Change since 2015-2019
In the labor force (age 16+)	58.1%±1.5 pts	59.3%	–
Unemployment rate	4.0%±1.1 pts	6.3%	−3.8 pts
Drove alone to work	82.8%±2.4 pts	78.6%	–
Carpooled	6.7%±1.7 pts	8.7%	–
Public transportation	0.4%±0.4 pts	0.9%	–
Walked	1.0%±0.6 pts	1.8%	–
Worked from home	8.1%±1.6 pts	8.1%	+4.8 pts
Mean travel time to work	27.2 min±1.3	25.7 min	no clear change

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov

What are St. Martin Parish's census tracts?

St. Martin Parish is divided into 17 census tracts. Among those with a reliable estimate, median household income runs from $35,286 (Tract 206.02) to $90,075 (Tract 206.01).

Census tracts of St. Martin Parish, ACS 2020-2024 5-year estimates; sort by any column

Tract 201.0122099020101	Catahoula (6%)	2,922	2,418±573	$54,167	$208,100	$1,130	10.1%
Tract 201.0222099020102	Catahoula (19%)	1,926	1,879±516	$44,474	$153,800	not published	15.6%
Tract 202.0122099020201	Cecilia (29%)	5,816	4,872±525	$57,347	$190,500	$638	12.0%
Tract 202.0222099020202	–	1,424	2,128±533	$38,684	$151,800	not published	30.8%
Tract 203.0122099020301	Breaux Bridge (25%)	4,657	4,883±615	$65,240	$171,500	$1,159	11.6%
Tract 203.0322099020303	Henderson (9%)	5,271	5,571±556	$71,000	$163,600	$960	10.8%
Tract 203.0422099020304	Henderson (53%)	2,743	2,689±327	$61,250	$116,700	$827	12.2%
Tract 204.0122099020401	St. Martinville (20%)	5,016	4,905±697	$54,310	$167,100	$815	10.5%
Tract 204.0222099020402	Parks (15%)	1,529	1,556±419	$55,208	$177,800	$483	14.1%
Tract 205.0222099020502	Breaux Bridge (89%)	3,684	3,456±450	$49,513	$176,300	$923	32.0%
Tract 205.0322099020503	Breaux Bridge (70%)	2,407	2,518±556	$53,840	$100,100	$902	29.6%
Tract 205.0422099020504	Breaux Bridge (75%)	2,855	2,811±409	$41,513	$172,700	$892	19.4%
Tract 206.0122099020601	Cade (28%)	2,854	2,770±473	$90,075	$302,300	not published	3.7%
Tract 206.0222099020602	St. Martinville (82%)	2,917	2,637±538	$35,286	$71,400	$765	17.3%
Tract 20822099020800	St. Martinville (21%)	2,711	2,800±476	$61,313	$167,300	not published	12.6%
Tract 20922099020900	St. Martinville (64%)	1,667	1,995±416	$63,182	$168,800	$822	19.3%
Tract 21022099021000	Morgan City (3%)	1,368	1,465±294	not published	$190,200	$1,086	10.3%

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · Check it at data.census.gov

How does St. Martin Parish compare with Louisiana's other counties?

St. Martin Parish's rank among Louisiana's counties with a reliable estimate (1 = highest)
Measure	Rank
Population	21st of 64
Growth 2020-2025	24th of 64
Residents per square mile	26th of 64
Median household income	29th of 64
Median home value	30th of 64
Median gross rent	30th of 64
Poverty rate	51st of 64
Bachelor's degree or higher	34th of 64
Median age	22nd of 64

Every county in Louisiana

Source: PlainCities ranks from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed

How these figures are made: methodology and release checks · reading a margin of error · every state · corrections

Not on this page: crime, weather and schools for St. Martin Parish are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.