St. Tammany Parish, Louisiana: Realigning Affluent Suburb county. In 2024, voted R+44%. Democratic peak: D+89 in 1932.
Key facts
- 2024 presidential margin
- R+44MIT Election Lab
- Political typology
- Realigning Affluent SuburbAkashic typology
- Population
- 272,4212024 5-year
- Median household income
- $81,2022024 5-year
- White (non-Hispanic)
- 73.8%2024 5-year
- Black
- 12.2%2024 5-year
- Hispanic / Latino
- 8.2%2024 5-year
- Peak Democratic margin
- D+89 in 1932MIT Election Lab
- Peak Republican margin
- R+55 in 1972MIT Election Lab
- Most similar
- Canadian County, OK · similarity 1.00
2024 results by precinct
2024 precinct map of St. Tammany ParishPrecinct-level 2024 presidential results for St. Tammany 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 | +35.4% |
| 1896 | +30.5% |
| 1900 | +52.8% |
| 1904 | +72.4% |
| 1908 | +69.2% |
| 1912 | +78.6% |
| 1916 | +77.0% |
| 1920 | +55.6% |
| 1924 | +53.4% |
| 1928 | +31.4% |
| 1932 | +89.3% |
| 1936 | +70.8% |
| 1940 | +74.0% |
| 1944 | +66.1% |
| 1948 | +7.4% |
| 1952 | +10.8% |
| 1956 | −7.7% |
| 1960 | +21.1% |
| 1964 | +8.2% |
| 1968 | −1.9% |
| 1972 | −55.2% |
| 1976 | −3.6% |
| 1980 | −30.6% |
| 1984 | −53.1% |
| 1988 | −41.4% |
| 1992 | −27.1% |
| 1996 | −27.5% |
| 2000 | −43.6% |
| 2004 | −50.2% |
| 2008 | −53.4% |
| 2012 | −52.3% |
| 2016 | −50.8% |
| 2020 | −44.2% |
| 2024 | −43.8% |
DemocraticRepublican
38 presidential elections
| Year | Won | Margin | Democratic | Republican | Total |
|---|---|---|---|---|---|
| R | 37,777 | 98,377 | 138,384 | ||
| R | 37,746 | 99,666 | 140,110 | ||
| R | 27,717 | 90,915 | 124,392 | ||
| R | 25,728 | 84,723 | 112,902 | ||
| R | 24,596 | 83,078 | 109,542 | ||
| R | 24,665 | 75,139 | 100,592 | ||
| R | 22,722 | 59,193 | 83,737 | ||
| R | 24,281 | 44,761 | 74,526 | ||
| R | 19,735 | 37,839 | 66,921 | ||
| R | 15,638 | 38,334 | 54,823 | ||
| R | 11,719 | 38,664 | 50,775 | ||
| R | 14,161 | 27,214 | 42,698 | ||
| R | 14,691 | 15,822 | 31,399 | ||
| R | 3,949 | 15,438 | 20,825 | ||
| O | 4,445 | 4,846 | 20,761 | ||
| D | 7,883 | 6,694 | 14,577 | ||
| D | 5,179 | 2,850 | 11,063 | ||
| R | 3,373 | 3,965 | 7,639 | ||
| D | 4,465 | 3,598 | 8,063 | ||
| O | 1,164 | 790 | 5,041 | ||
| D | 3,450 | 703 | 4,153 | ||
| D | 4,475 | 668 | 5,143 | ||
| D | 3,477 | 594 | 4,071 | ||
| D | 3,206 | 178 | 3,389 | ||
| D | 1,811 | 945 | 2,756 | ||
| D | 969 | 269 | 1,311 | ||
| D | 967 | 276 | 1,243 | ||
| D | 782 | 95 | 892 | ||
| D | 668 | 30 | 812 | ||
| D | 755 | 107 | 937 | ||
| D | 453 | 59 | 544 | ||
| D | 515 | 159 | 674 | ||
| D | 636 | 317 | 1,046 | ||
| D | 501 | 239 | 740 | ||
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Demographics
2024 ACS
Race, ethnicity, and ancestry
Click any group to see the ancestries typically reported within it.
German
14.9%
French
14.1%
Irish
13.1%
English
10.8%
Italian
10.3%
American
9.6%
Scottish
1.6%
African American
9.8%
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: 40.5 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
$81,202
St. Tammany Parish ranks in the top 25% of US counties.
St. Tammany Parish$81,202
Louisiana$60,756
United States$80,734
St. Tammany Parish ranks in the top 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
11.4%
Children face moderate poverty.
Children under 1815.0%
Working age (18–64)10.2%
Seniors (65+)11.0%
Source · American Community Survey 5-year estimates, 2024 release.
2024 ACS
Language at home
Population aged 5 and older
93.0%
speak English only
Spanish4.3%
Other Indo-European1.4%
Asian & Pacific Islander1.0%
Other languages0.3%
Source · ACS 5-year estimates, 2024.
2020 religion census
Religious adherents
Adherents per capita by tradition
Source · 2020 US Religion Census. Remaining 19.0% of residents not counted as adherents by any reporting body.
Across Lake Pontchartrain from New Orleans, St. Tammany has absorbed decades of suburban migration and now returns presidential margins exceeding 40 points, making it one of the most reliably one-sided large counties in the Deep South.
Once reliably Republican — a margin of fifty-five points in 1972 at its widest — St. Tammany Parish has trended Democratic. The 2024 margin was forty-four points.
A median household income of $81,202 — among the higher at this geographic scale — and a population of 272,421 describe the county. The county's voting pattern over the last decade is most similar to that of Canadian County and Autauga 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. Tammany Parish, Louisiana. Akashic. https://akashic.app/county/22103/. 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. Tammany Parish, Louisiana vote in 2024?
In 2024, St. Tammany Parish, Louisiana voted Republican by 43.8 points (R+44), carried by the Republican candidate. Out of 138,384 votes cast, 37,777 went Democratic and 98,377 went Republican.
What is St. Tammany Parish, Louisiana's political typology?
Akashic places St. Tammany Parish, Louisiana in the "Realigning Affluent Suburb" typology — College-educated, affluent suburbs — the one bloc moving toward the Democratic Party. 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 17 times, Republican 15 times, and other 2 times.
When did St. Tammany Parish, Louisiana last vote Democratic?
The most recent presidential election in which St. Tammany Parish, Louisiana voted Democratic was 1964.
How many people live in St. Tammany Parish, Louisiana?
St. Tammany Parish, Louisiana has a population of 272,421 according to the 2024 American Community Survey 5-year estimates from the US Census Bureau.
What is the median household income in St. Tammany Parish, Louisiana?
Median household income in St. Tammany Parish, Louisiana is $81,202 — above the national median of $80,734. The Louisiana state median is $60,756.
What is the political history of St. Tammany Parish, Louisiana?
Akashic tracks 38 presidential elections in St. Tammany Parish, Louisiana from 1876 to 2024. Of those, 17 went Democratic and 15 went Republican. The county's typology — "Realigning Affluent Suburb" — captures where that record, its demographics, and its recent swing place it among American communities.