St. Mary Parish, Louisiana: Sunbelt Conservative county. In 2024, voted R+32%. Democratic peak: D+74 in 1944.
Key facts
- 2024 presidential margin
- R+32MIT Election Lab
- Political typology
- Sunbelt ConservativeAkashic typology
- Population
- 47,8282024 5-year
- Median household income
- $52,5762024 5-year
- White (non-Hispanic)
- 56.9%2024 5-year
- Black
- 28.9%2024 5-year
- Hispanic / Latino
- 9.8%2024 5-year
- Peak Democratic margin
- D+74 in 1944MIT Election Lab
- Peak Republican margin
- R+41 in 1972MIT Election Lab
- Most similar
- Wheeler County, GA · similarity 0.99
2024 results by precinct
2024 precinct map of St. Mary ParishPrecinct-level 2024 presidential results for St. Mary Parish, with each precinct boundary colored by Democratic-vs-Republican margin.
—
Margin—
Turnout—
Harris +50Trump +50
Real precinct boundaries. Hover for vote totals.
presidential history
Presidential margin, 1876–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 1876 | No data |
| 1880 | No data |
| 1884 | No data |
| 1888 | No data |
| 1892 | +64.4% |
| 1896 | +0.9% |
| 1900 | +14.9% |
| 1904 | +58.8% |
| 1908 | +46.2% |
| 1912 | +47.7% |
| 1916 | +34.5% |
| 1920 | −18.8% |
| 1924 | +0.5% |
| 1928 | +48.7% |
| 1932 | +62.8% |
| 1936 | +59.9% |
| 1940 | +66.6% |
| 1944 | +73.9% |
| 1948 | +2.7% |
| 1952 | −1.9% |
| 1956 | −25.5% |
| 1960 | +34.0% |
| 1964 | −14.0% |
| 1968 | +4.4% |
| 1972 | −41.1% |
| 1976 | +2.6% |
| 1980 | +0.6% |
| 1984 | −23.5% |
| 1988 | −5.3% |
| 1992 | +7.9% |
| 1996 | +19.4% |
| 2000 | −6.8% |
| 2004 | −14.7% |
| 2008 | −16.8% |
| 2012 | −18.8% |
| 2016 | −27.6% |
| 2020 | −29.1% |
| 2024 | −31.9% |
DemocraticRepublican
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| R | 7,011 | 13,671 | 20,897 | ||
| R | 8,055 | 14,811 | 23,186 | ||
| R | 8,050 | 14,359 | 22,877 | ||
| R | 9,450 | 13,885 | 23,640 | ||
| R | 9,345 | 13,183 | 22,903 | ||
| R | 9,547 | 12,877 | 22,694 | ||
| R | 9,851 | 11,325 | 21,810 | ||
| D | 12,402 | 8,018 | 22,569 | ||
| D | 10,648 | 8,792 | 23,440 | ||
| R | 10,364 | 11,540 | 22,318 | ||
| R | 9,411 | 15,275 | 24,974 | ||
| D | 10,506 | 10,378 | 21,606 | ||
| D | 9,401 | 8,919 | 18,708 | ||
| R | 4,435 | 11,117 | 16,243 | ||
| O | 5,312 | 4,586 | 16,659 | ||
| R | 5,530 | 7,327 | 12,857 | ||
| D | 6,671 | 2,992 | 10,832 | ||
| R | 2,395 | 4,097 | 6,663 | ||
| R | 4,249 | 4,417 | 8,666 | ||
| O | 918 | 824 | 3,503 | ||
| D | 3,591 | 538 | 4,129 | ||
| D | 3,686 | 739 | 4,425 | ||
| D | 1,942 | 487 | 2,429 | ||
| D | 2,072 | 473 | 2,545 | ||
| D | 1,754 | 605 | 2,359 | ||
| D | 639 | 633 | 1,300 | ||
| R | 539 | 788 | 1,327 | ||
| D | 652 | 162 | 1,419 | ||
| D | 652 | 147 | 1,058 | ||
| D | 767 | 273 | 1,070 | ||
| D | 749 | 193 | 946 | ||
| D | 818 | 606 | 1,424 | ||
| D | 591 | 580 | 1,200 | ||
| D | 1,311 | 284 | 1,595 | ||
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Demographics
2024 ACS
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
French
12.9%
German
5.8%
American
5.2%
Irish
4.4%
English
4.4%
Italian
3.6%
African American
23.1%
Multiple ancestry combinations reported; no single grouping above 1%.
American Indian, Alaska Native, Native Hawaiian, and Pacific Islander combined.
Source · American Community Survey 5-year estimates, 2024 release. Hispanic/Latino is an ethnicity that overlaps the race categories, so these shares can total more than 100%. Ancestry is a self-reported, multiple-response item; ancestry percentages do not sum to the parent race percentage.
2024 ACS
Age distribution by sex
Median age: 39.7 in this county, 39.1 nationally
Male
Age
Female
85+
75–84
65–74
55–64
45–54
35–44
25–34
18–24
5–17
<5
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Median household income
Inflation-adjusted dollars
$52,576
St. Mary Parish ranks in the bottom 25% of US counties.
St. Mary Parish$52,576
Louisiana$60,756
United States$80,734
St. Mary Parish ranks in the bottom 25% of US counties by median household income.
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Poverty rate
All persons below federal poverty line
20.8%
Children face higher poverty than working-age adults.
Children under 1827.1%
Working age (18–64)18.3%
Seniors (65+)22.2%
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Language at home
Population aged 5 and older
90.0%
speak English only
Spanish7.3%
Other Indo-European1.5%
Asian & Pacific Islander1.1%
Other languages0.2%
Source · ACS 5-year estimates, 2024.
2020 religion census
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 38.6% of residents not counted as adherents by any reporting body.
St. Mary Parish sits at the edge of Louisiana's Atchafalaya Basin, where the offshore energy industry anchors both the local economy and a voter profile that has shifted decisively rightward over the past two decades, reaching an R+31.9 margin in 2024.
The Republican margin here reached forty-one points in 1972. Between 2020 and 2024 the county moved three points toward the Republican candidate; the 2024 margin was thirty-two points.
A median household income of $52,576, a 57% non-Hispanic-white share, and a population of 47,828 describe the county. The county's voting pattern over the last decade is most similar to that of Wheeler County and Lanier County.
Most similar counties
Compare two places, side by side
Twelve curated comparisons line up election history, demographics, and the divergence story for two places at a glance. Browse all comparisons →
Cite this page
All citations released under CC BY 4.0. Attribution: Akashic Intelligence.
St. Mary Parish, Louisiana. Akashic. https://akashic.app/county/22101/. Accessed May 20, 2026. License: CC BY 4.0.
License: CC BY 4.0
More in Louisiana
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Frequently asked questions
How did St. Mary Parish, Louisiana vote in 2024?
In 2024, St. Mary Parish, Louisiana voted Republican by 31.9 points (R+32), carried by the Republican candidate. Out of 20,897 votes cast, 7,011 went Democratic and 13,671 went Republican.
What is St. Mary Parish, Louisiana's political typology?
Akashic places St. Mary Parish, Louisiana in the "Sunbelt Conservative" typology — Affluent, predominantly white Sunbelt counties — reliably Republican. The typology is a data-driven cluster built from vote share, vote swing, race and ethnicity, income, language spoken at home, religion, and ancestry. Across 38 elections in the dataset, the county has voted Democratic 18 times, Republican 14 times, and other 2 times.
When did St. Mary Parish, Louisiana last vote Democratic?
The most recent presidential election in which St. Mary Parish, Louisiana voted Democratic was 1996.
How many people live in St. Mary Parish, Louisiana?
St. Mary Parish, Louisiana has a population of 47,828 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in St. Mary Parish, Louisiana?
Median household income in St. Mary Parish, Louisiana is $52,576 — below the national median of $80,734. The Louisiana state median is $60,756.
What is the political history of St. Mary Parish, Louisiana?
Akashic tracks 38 presidential elections in St. Mary Parish, Louisiana from 1876 to 2024. Of those, 18 went Democratic and 14 went Republican. The county's typology — "Sunbelt Conservative" — captures where that record, its demographics, and its recent swing place it among American communities.