Census-designated place · Mississippi
St. Martin, Mississippi
St. Martin, census-designated place, in Jackson County, Mississippi. St. Martin had 8,139 people in the ACS 2020-2024 5-year estimates (±1,348). GEOID 2864680.
Residents, 2020-2024
8,139
±1,348 (90% margin)
2020 Census count: 7,811
Median household income
$55,000
±$6,876 (90% margin)
Mississippi: $56,447
Median home value
$172,400
±$19,779 (90% margin)
Mississippi: $169,800
Median gross rent
$1,231
±$114 (90% margin)
Mississippi: $954
Where is St. Martin and what county is it in?
St. Martin is a census-designated place: an unincorporated community the Census Bureau draws for counting, with no city government of its own, in Jackson County, Mississippi. It covers 4.3 square miles of land, 1,821 residents per square mile in 2020.
St. Martin is in the Gulfport-Biloxi, MS metropolitan statistical area, which takes in 4 counties (Census Bureau delineation, July 2023).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in St. Martin, and is it growing?
The 2020-2024 American Community Survey puts St. Martin's population at 8,139 (±1,348). The 2020 Census counted 7,811 residents.
The Census Bureau publishes yearly population estimates for incorporated places only; St. Martin is a census-designated place, so its figures come from the ACS and the 2020 Census.
| Measure | St. Martin | Jackson County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 8,139 ±1,348 | 145,249 | no clear change |
| Households | 3,020 ±246 | 57,647 | no clear change |
| Average household size | 2.68 ±0.33 | 2.50 | no clear change |
| Housing units | 3,296 ±250 | 63,558 | no clear change |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in St. Martin?
The median resident of St. Martin is 37.3 years old; 21.8% are under 18 and 11.9% are 65 or older. The largest group is non-Hispanic white residents at 71.6%, then non-Hispanic Black residents at 13.6%. 5.6% of residents were born outside the United States.
| Measure | St. Martin | Jackson County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 37.3 ±2.4 | 40.1 | no clear change |
| Under 18 years | 21.8% ±3.2 pts | 22.9% | – |
| 65 years and over | 11.9% ±2.0 pts | 17.3% | – |
| Male | 44.2% ±4.2 pts | 49.2% | – |
| Hispanic or Latino (any race) | 5.6% ±3.4 pts | 7.6% | – |
| White alone, not Hispanic | 71.6% ±7.3 pts | 66.1% | no clear change |
| Black or African American alone, not Hispanic | 13.6% ±5.5 pts | 18.9% | no clear change |
| Asian alone, not Hispanic | 5.7% ±2.0 pts | 2.1% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±0.6 pts | 0.4% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±0.6 pts | 0.0% | – |
| Two or more races, not Hispanic | 3.4% ±2.0 pts | 4.3% | – |
| Some other race alone, not Hispanic | 0.0% ±0.6 pts | 0.6% | – |
| Born outside the United States | 5.6% ±2.6 pts | 3.3% | no clear change |
| Speak a language other than English at home (age 5+) | 7.7% ±4.7 pts | 6.8% | – |
| Civilian veterans (age 18+) | 8.6% ±2.6 pts | 10.4% | – |
| With a disability | 22.2% ±6.3 pts | 21.5% | – |
| No health insurance coverage | 18.1% ±4.2 pts | 11.5% | no clear change |
| High school graduate or higher (age 25+) | 78.8% ±11.7 pts | 89.0% | – |
| Bachelor's degree or higher (age 25+) | 17.3% ±5.8 pts | 26.7% | no clear change |
| Graduate or professional degree (age 25+) | 3.7% ±2.0 pts | 9.5% | – |
| Lived in the same house a year earlier | 88.1% ±4.8 pts | 88.2% | – |
| Moved from another state in the past year | 4.3% ±2.4 pts | 2.7% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in St. Martin earn?
Half of St. Martin's 3,020 households earn less than $55,000 a year (±$6,876), against $66,201 in Jackson County and $56,447 in Mississippi. In 2015-2019 it was $58,101 in 2024 dollars; the margins of error cannot tell the two periods apart. 17.2% of residents live below the poverty line.
| Measure | St. Martin | Jackson County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $55,000 ±$6,876 | $66,201 | no clear change |
| Mean household income | $68,612 ±$8,052 | $88,071 | – |
| Per capita income | $26,489 ±$4,194 | $35,389 | no clear change |
| People below the poverty line | 17.2% ±7.1 pts | 13.8% | no clear change |
| Children under 18 below the poverty line | 31.2% ±15.6 pts | 16.4% | – |
| Households receiving SNAP | 12.6% ±6.1 pts | 9.2% | – |
| Households with a computer | 97.6% ±1.9 pts | 96.4% | – |
| Households with a broadband subscription | 95.7% ±2.4 pts | 89.7% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in St. Martin?
Owners occupy 53.9% of St. Martin's occupied homes and renters 46.1%. The median owner-occupied home is valued at $172,400 by its owner (±$19,779). The median renter pays $1,231 a month including utilities, and 49.8% of renters pay 35% or more of their income on rent.
| Measure | St. Martin | Jackson County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $172,400 ±$19,779 | $193,100 | no clear change |
| Median gross rent | $1,231 ±$114 | $1,101 | no clear change |
| Renters paying 35% or more of income on rent | 49.8% ±12.1 pts | 41.2% | +23.4 pts |
| Median monthly owner costs, with a mortgage | $1,383 ±$88 | $1,550 | – |
| Owner-occupied homes | 53.9% ±6.6 pts | 72.7% | no clear change |
| Renter-occupied homes | 46.1% ±6.6 pts | 27.3% | – |
| Housing units | 3,296 ±250 | 63,558 | no clear change |
| Homeowner vacancy rate | 1.2% ±2.1 pts | 1.4% | – |
| Rental vacancy rate | 13.7% ±9.1 pts | 10.8% | – |
| Single-family detached homes | 61.5% ±5.9 pts | 74.3% | – |
| Mobile homes | 1.6% ±1.7 pts | 8.5% | – |
| Built 2020 or later | 0.9% ±1.1 pts | 1.8% | – |
| Built 2010 to 2019 | 8.9% ±4.0 pts | 8.6% | – |
| Built 1939 or earlier | 0.0% ±1.4 pts | 1.9% | – |
| Households with no vehicle | 9.0% ±4.7 pts | 4.8% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How do people in St. Martin work and get to work?
84.7% of St. Martin's workers drive alone. The average trip to work takes 22.1 minutes. The unemployment rate in 2020-2024 averaged 6.7%.
| Measure | St. Martin | Jackson County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 56.6% ±6.8 pts | 60.3% | – |
| Unemployment rate | 6.7% ±4.3 pts | 6.7% | no clear change |
| Drove alone to work | 84.7% ±5.9 pts | 81.9% | – |
| Carpooled | 6.9% ±3.8 pts | 9.1% | – |
| Public transportation | 0.0% ±1.3 pts | 0.0% | – |
| Walked | 1.1% ±1.7 pts | 0.5% | – |
| Worked from home | 5.0% ±4.2 pts | 7.2% | – |
| Mean travel time to work | 22.1 min ±2.6 | 25.2 min | no clear change |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What census tracts are in St. Martin?
2 census tracts lie mostly in St. Martin, and 1 more reaches into it (2020 census blocks). Their median household incomes run from $50,857 (Tract 403.01) to $62,882 (Tract 403.02).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 403.01Jackson County | 5,581 | $50,857 |
| Tract 403.02Jackson County | 2,558 | $62,882 |
| Tract 404.02Jackson County | 4,072 | $82,330 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in St. Martin) · Census block assignment files
How does St. Martin compare with other places in Mississippi?
St. Martin ranks 57th of 172 places in Mississippi with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population (ACS 2020-2024) | 49th | 186 |
| Residents per square mile | 6th | 187 |
| Median household income | 57th | 172 |
| Per capita income | 93rd | 183 |
| Median home value | 55th | 178 |
| Median gross rent | 22nd | 161 |
| Poverty rate | 121st | 160 |
| Bachelor's degree or higher | 114th | 171 |
| Median age | 95th | 186 |
| Owner-occupied share | 137th | 182 |
| Travel time to work | 109th | 185 |
St. Martin's figures with every place in Mississippi (CSV)
Every place in Mississippi, sortable · Compare St. Martin with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for St. Martin?
11 of the 57 figures for St. Martin on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for St. Martin are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.