Mermentau, Louisiana Demographics & Population 2026

Name: Mermentau, Louisiana Demographics
Creator: U.S. Census Bureau
License: https://www.census.gov/data/developers/about/terms-of-service.html

During the 2020–2024 ACS period, Mermentau, Louisiana had a total population of 627, the 325th largest village in Louisiana, with a median household income of $117,764, which is 94% higher than the state average. The poverty rate is 20.4%.

Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes

Key Takeaways

Household income is 94% above the state average — one of the wealthiest communities in Louisiana.
37.0% of adults hold a bachelor's degree or higher — top 10% in Louisiana.
Housing is very affordable with a home-value-to-income ratio of just 0.5x.
Unemployment rate of 16.3% is notably above the national average.

Mermentau Quick Facts

Population 627

Median Household Income $117,764

Median Home Value $55,300

Poverty Rate 20.4%

Unemployment Rate 16.3%

Median Age 64.0 years

Homeownership Rate 86.1%

Affordability Ratio 0.5x

Bachelor's Degree or Higher 37.0%

High School Graduation Rate 83.8%

Diversity Index 29/100

Population 627 325th of 488

Median Income $117,764 top 10%

Poverty Rate 20.4% 64% higher than national

Median Home Value $55,300 bottom 10%

How Mermentau Changed

Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.

Metric	2019–2023	2020–2024	Change
Population	570	627	+10.0%
Median household income	$112,864	$117,764	+4.3%
Median home value	$55,900	$55,300	-1.1%

How Mermentau Compares

Median Household Income

Mermentau

$117,764

$60,756

National

$80,734

Median Home Value

Mermentau

$55,300

$216,500

National

$332,700

Economy & Housing

Household Income Distribution

Under $25K 18.9%

$25K-$50K 12.9%

$50K-$100K 12.6%

$100K+ 55.5%

Detailed income brackets

Under $10K

8.2%

$10K-$15K

2.8%

$15K-$20K

6.0%

$20K-$25K

1.9%

$25K-$30K

0.9%

$30K-$35K

0.3%

$35K-$40K

5.4%

$40K-$45K

0.6%

$45K-$50K

5.7%

$50K-$60K

4.1%

$60K-$75K

3.1%

$75K-$100K

5.4%

$100K-$125K

52.4%

$125K-$150K

3.1%

$150K-$200K

0.0%

$200K+

0.0%

Employment

16.3% Unemployment Rate State: 6.3%|National: 5.2%

25.9% Labor Force Participation

Housing Overview

Owner 86.1%

Renter 13.9%

Affordability Index Very Affordable

0.5x home value to income ratio

Median gross rent $478/mo 4.9% of median household income annually

People & Demographics

Age Distribution

Under 18

14.8%

18-34

12.0%

35-54

16.3%

55-74

49.4%

75+

7.5%

Race & Ethnicity

Diversity Index

Low Diversity

A less diverse community where one racial or ethnic group represents a large majority.

State average: 59 | National average: 61

Education

Educational Attainment (Adults 25+)

Mermentau Rankings in Louisiana

#325 Population of 488

#11 Median Income of 437

#37 Education of 488

#407 Home Value of 425

Explore Louisiana Rankings

Cities by Population All cities ranked by size Richest Cities Ranked by median income Most Educated By bachelor's degree rate Most Affordable By housing affordability

Other Cities in Acadia Parish

City	Population	Median Income	Poverty	Home Value
Crowley	11,422	$28,642	47.7%	$144,900
Rayne	7,105	$42,151	25.5%	$156,500
Church Point	4,096	$46,087	24.0%	$96,700
Basile	1,790	$52,415	17.4%	$100,700
Iota	1,481	$40,833	32.0%	$157,500
Morse	1,099	N/A	21.8%	$82,600
Egan	1,015	$93,196	10.3%	$220,000
Estherwood	622	$45,833	27.2%	$88,900
Branch	268	N/A	43.9%	N/A
Midland	203	$66,389	0.0%	N/A

Cities Similar to Mermentau

These cities in the same state have comparable population and economic profiles.

City	Population	Median Income	Home Value	Bachelor's+	Poverty
Wallace Ridge	628	N/A	$200,000	14.5%	25.8%
Grand Isle	623	N/A	$269,500	15.4%	36.5%
Convent	637	N/A	N/A	20.0%	4.4%
Reddell	653	N/A	$65,500	1.0%	33.1%
Gillis	667	N/A	N/A	8.8%	0.0%

A note before these figures: with a population of 627, Mermentau's ACS estimates come from a small number of survey responses and carry wide margins of error. Individual percentages below — particularly rates that round to 0% or 100% — are approximations, not precise measurements. See data.census.gov for the published margins of error.

Population Overview

Mermentau is a small community located in Louisiana, within Acadia Parish. The total population is 627. It ranks as the 325th most populous out of 488 Census-designated places in Louisiana.

Age Demographics

The median age in Mermentau is 64.0 years. This is 68% higher than the state median of 38.0 years. Only 14.8% of residents are under 18, indicating fewer families with children.

Economy, Income & Housing

The median household income in Mermentau is $117,764. This is 94% higher than the state median of $60,756. It is also 46% higher than the national median of $80,734. The poverty rate stands at 20.4%. This is 8% higher than the state poverty rate of 18.9%. With more than one in five residents living below the poverty line, economic hardship is a significant challenge for the community. The unemployment rate is 16.3%. This is 159% higher than the state rate of 6.3%. The median home value is $55,300. Housing costs are 74% lower than the state median of $216,500. With a home-value-to-income ratio of just 0.5x, Mermentau is one of the most affordable housing markets in the area. 86.1% of occupied housing units are owner-occupied. This homeownership rate is 28% higher than the state average of 67.4%.

Race & Ethnicity

The largest racial or ethnic group in Mermentau is White (non-Hispanic), making up 83.3% of the population. Black or African American residents account for 11.8%. The Black or African American population (11.8%) is well below the state average of 30.5%. The Hispanic or Latino population (1.6%) is well below the state average of 7.2%.

Education

37.0% of residents aged 25 and older hold a bachelor's degree or higher. This places Mermentau in the top 10% of all cities in the state for educational attainment. This is 37% higher than the state rate of 27.0%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 83.8%.

Data Sources & Methodology

All demographic data for Mermentau, Louisiana is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against Louisiana state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 488 Census-designated places in Louisiana. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.

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Frequently Asked Questions

What is the population of Mermentau, Louisiana?

Mermentau, Louisiana has a population of 627 according to the most recent U.S. Census ACS 5-Year Estimates.

What is the median household income in Mermentau, LA?

The median household income in Mermentau is $117,764, which is 46% higher than the national median of $80,734.

What is the poverty rate in Mermentau, LA?

The poverty rate in Mermentau is 20.4%. This means approximately 128 residents live below the federal poverty line.

What is the racial makeup of Mermentau, Louisiana?

Mermentau's population is 83.3% White, 11.8% Black, 1.6% Hispanic/Latino, and 0.0% Asian.

What is the median home value in Mermentau, LA?

The median home value in Mermentau is $55,300. The home-value-to-income ratio is 0.5x.

How educated is Mermentau, Louisiana?

37.0% of adults (25+) in Mermentau hold a bachelor's degree or higher, and 1.4% hold a graduate or professional degree.