Market insights · Louisiana
St. Martin Parish, LA: growth, migration and housing
St. Martin Parish has 51,106 residents, down 1.0% since 2020 (-0.4% in the last year). In 2022–2023, 1,234 households moved in and 1,290 moved out (-56 net), bringing in a net $0.5M of income. Median household income is $55,960, the median home $164,200 and median rent $870 a month.
In Louisiana: 23rd of 64 counties for 5-year population growth · 18th of 64 counties for net in-migration (per resident) · 29th of 64 counties for median household income · 30th of 64 counties for median home value.
Where new residents came from
Top counties by households (tax returns) moving to St. Martin Parish, 2022–2023 (IRS).
| From | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Lafayette Parish, LA | 541 | $22.9M |
| Iberia Parish, LA | 145 | $5.8M |
| St. Landry Parish, LA | 105 | $4.7M |
| Vermilion Parish, LA | 43 | $1.5M |
| Acadia Parish, LA | 36 | $1.0M |
| St. Mary Parish, LA | 31 | $1.4M |
| East Baton Rouge Parish, LA | 29 | $1.4M |
| Harris County, TX | 24 | $0.9M |
Where leavers went
Top counties by households leaving St. Martin Parish, 2022–2023 (IRS).
| To | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Lafayette Parish, LA | 571 | $25.3M |
| Iberia Parish, LA | 122 | $3.9M |
| St. Landry Parish, LA | 83 | $3.5M |
| Harris County, TX | 40 | $1.0M |
| East Baton Rouge Parish, LA | 36 | $1.7M |
| Vermilion Parish, LA | 34 | $1.0M |
| St. Mary Parish, LA | 27 | $1.3M |
| Acadia Parish, LA | 26 | $1.0M |
BizyFi in St. Martin Parish
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Sources: U.S. Census Bureau population estimates (vintage 2025), American Community Survey 5-year (2024), and IRS Statistics of Income county-to-county migration data (2022–2023). Migration counts are tax returns (roughly households) moving between U.S. counties; the IRS suppresses very small flows. Growth rates, per-1,000 figures, rent share and state ranks are BizyFi calculations. Data updated 2026-10-17. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.