St. Mary Parish, Louisiana
Precinct data
Results by precinct
46 precincts · 20,899 votes
Precinct boundaries and identifiers are cycle-specific. This table does not join rows across years without a validated crosswalk.
| Precinct -000022000022 | 136 | 703 | 8 | 847 | 16.1% | 83.0% | R+66.9 |
|---|---|---|---|---|---|---|---|
| Precinct -000029000029 | 69 | 656 | 0 | 725 | 9.5% | 90.5% | R+81.0 |
| Precinct -000007000007 | 454 | 246 | 4 | 704 | 64.5% | 34.9% | D+29.5 |
| Precinct -000025000025 | 451 | 217 | 11 | 679 | 66.4% | 32.0% | D+34.5 |
| Precinct -000019000019 | 91 | 572 | 8 | 671 | 13.6% | 85.2% | R+71.7 |
| Precinct -000026000026 | 278 | 376 | 16 | 670 | 41.5% | 56.1% | R+14.6 |
| Precinct -000006000006 | 183 | 480 | 6 | 669 | 27.4% | 71.7% | R+44.4 |
| Precinct -000031000031 | 54 | 595 | 0 | 649 | 8.3% | 91.7% | R+83.4 |
| Precinct -000024000024 | 179 | 417 | 6 | 602 | 29.7% | 69.3% | R+39.5 |
| Precinct -000033000033 | 70 | 530 | 1 | 601 | 11.6% | 88.2% | R+76.5 |
| Precinct -000032000032 | 59 | 522 | 4 | 585 | 10.1% | 89.2% | R+79.1 |
| Precinct -000045000045 | 134 | 420 | 6 | 560 | 23.9% | 75.0% | R+51.1 |
| Precinct -000010000010 | 283 | 246 | 7 | 536 | 52.8% | 45.9% | D+6.9 |
| Precinct -000035000035 | 178 | 351 | 7 | 536 | 33.2% | 65.5% | R+32.3 |
| Precinct -000030000030 | 69 | 463 | 3 | 535 | 12.9% | 86.5% | R+73.6 |
| Precinct -000037000037 | 111 | 411 | 7 | 529 | 21.0% | 77.7% | R+56.7 |
| Precinct -000028000028 | 62 | 463 | 3 | 528 | 11.7% | 87.7% | R+75.9 |
| Precinct -000041000041 | 64 | 440 | 3 | 507 | 12.6% | 86.8% | R+74.2 |
| Precinct -000039000039 | 153 | 328 | 7 | 488 | 31.4% | 67.2% | R+35.9 |
| Precinct -000014000014 | 178 | 301 | 1 | 480 | 37.1% | 62.7% | R+25.6 |
| Precinct -000021000021 | 89 | 386 | 3 | 478 | 18.6% | 80.8% | R+62.1 |
| Precinct -000038000038 | 134 | 330 | 8 | 472 | 28.4% | 69.9% | R+41.5 |
| Precinct -000034000034 | 72 | 390 | 6 | 468 | 15.4% | 83.3% | R+67.9 |
| Precinct -000027000027 | 151 | 303 | 4 | 458 | 33.0% | 66.2% | R+33.2 |
| Precinct -000036000036 | 60 | 382 | 3 | 445 | 13.5% | 85.8% | R+72.4 |
| Precinct -000017000017 | 193 | 215 | 8 | 416 | 46.4% | 51.7% | R+5.3 |
| Precinct -000023000023 | 101 | 307 | 4 | 412 | 24.5% | 74.5% | R+50.0 |
| Precinct -000040000040 | 82 | 319 | 4 | 405 | 20.2% | 78.8% | R+58.5 |
| Precinct -6A6A | 50 | 346 | 3 | 399 | 12.5% | 86.7% | R+74.2 |
| Precinct -000005000005 | 218 | 159 | 6 | 383 | 56.9% | 41.5% | D+15.4 |
| Precinct -000009000009 | 89 | 261 | 0 | 350 | 25.4% | 74.6% | R+49.1 |
| Precinct -000015000015 | 169 | 175 | 3 | 347 | 48.7% | 50.4% | R+1.7 |
| Precinct -000020000020 | 243 | 102 | 1 | 346 | 70.2% | 29.5% | D+40.8 |
| Precinct -000043000043 | 79 | 261 | 4 | 344 | 23.0% | 75.9% | R+52.9 |
| Precinct -000013000013 | 176 | 155 | 4 | 335 | 52.5% | 46.3% | D+6.3 |
| Precinct -000011000011 | 116 | 202 | 6 | 324 | 35.8% | 62.3% | R+26.5 |
| Precinct -000018000018 | 280 | 35 | 7 | 322 | 87.0% | 10.9% | D+76.1 |
| Precinct -000008000008 | 305 | 12 | 4 | 321 | 95.0% | 3.7% | D+91.3 |
| Precinct -000016000016 | 278 | 36 | 1 | 315 | 88.3% | 11.4% | D+76.8 |
| Precinct -000012000012 | 196 | 96 | 4 | 296 | 66.2% | 32.4% | D+33.8 |
| Precinct -000004000004 | 74 | 179 | 3 | 256 | 28.9% | 69.9% | R+41.0 |
| Precinct -000002000002 | 146 | 94 | 4 | 244 | 59.8% | 38.5% | D+21.3 |
| Precinct -000003000003 | 184 | 48 | 4 | 236 | 78.0% | 20.3% | D+57.6 |
| Precinct -000042000042 | 163 | 48 | 6 | 217 | 75.1% | 22.1% | D+53.0 |
| Precinct -000044000044 | 106 | 13 | 4 | 123 | 86.2% | 10.6% | D+75.6 |
| Precinct -000001000001 | 3 | 83 | 0 | 86 | 3.5% | 96.5% | R+93.0 |
Presidential margin, 1892–2024
Democratic minus Republican, by election
| Year | Margin (D minus R) |
|---|---|
| 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% |
U.S. Senate
| Year | Won | Democratic | Republican | Total |
|---|---|---|---|---|
| 2022 | R | 28.2%4,083 | 69.5%10,054 | 14,461 |
| 2020 | R | 30.3%6,718 | 65.3%14,509 | 22,203 |
Registered voters
By party of registration, over time
St. Mary Parish, LA registers Democratic but votes Republican — a 34-point gap between how voters register and how they vote, the signature of ancestral registration that trails realignment.
31,991 registered voters · 2024
Who moves in and out
Net migration over time, and who arrivals are — where they came from and what those places vote
−462 net domestic migration · 2025
Net −10,594 over 2011–2025 · gain loss
Arrivals reported $38,877 in average income, against $61,413 for residents who stayed — 37% lower. (IRS SOI, 2022–23)
The places arrivals came from lean R+34.4 on average — 2.5 points more Republican-leaning than St. Mary Parish, LA itself (R+31.9).
Where arrivals came from lean of each source
- Iberia Parish, LA95R+34.1
- Lafayette Parish, LA80R+31.4
- Terrebonne Parish, LA73R+51.8
- Assumption Parish, LA70R+35.6
- Lafourche Parish, LA45R+62.1
- East Baton Rouge Parish, LA30D+11.1
Where departures went households, 2022–23
- Iberia Parish, LA143
- Lafayette Parish, LA143
- Terrebonne Parish, LA78
- Assumption Parish, LA64
- Lafourche Parish, LA52
- Harris County, TX49
Migration is one input to a place’s political change, not its cause — a shift can also come from residents changing their minds, generational turnover, or turnout. These figures describe the places people moved between; they do not measure how any mover voted.
| Year | Net domestic migration |
|---|---|
| 2011 | −629 |
| 2012 | −918 |
| 2013 | −227 |
| 2014 | −678 |
| 2015 | −720 |
| 2016 | −1,073 |
| 2017 | −1,573 |
| 2018 | −1,029 |
| 2019 | −622 |
| 2021 | −875 |
| 2022 | −458 |
| 2023 | −846 |
| 2024 | −484 |
| 2025 | −462 |
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.
Across the recorded series it reached a Democratic high of 73.9 points in 1944 and a Republican high of 41.1 points in 1972. Between 2020 and 2024 the county moved 2.7 points toward the Republican candidate; the 2024 margin was 31.9 points.
A population of 47,828, a 53% non-Hispanic-white share, and a median household income of $52,576 describe the county. The county's voting pattern over the last decade is most similar to that of Avoyelles Parish and Iberia Parish.
The counties whose fingerprint — 2000–2024 trajectory, demographics, ancestry, religion — sits closest to this one, and why.
Twin score (0–100) = weighted cosine between tier-standardized fingerprints: presidential margins 2000–2024 with 12-yr trend and elasticity, ACS income, age, education, population and race, top reported ancestries, and religious adherence — chips name the closest-shared dimensions and the widest gap. Re-weight the groups in the twins explorer.
Browse places by community — income, education, race & ethnicity, language — all community cuts →
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 →
St. Mary Parish, Louisiana. Akashic. https://akashic.app/county/22101/. Accessed May 20, 2026. License: CC BY 4.0.