St. Mary Parish Population

1830–2026

46,131

2026 projection

6.1% since 2020 (decrease)

010K20K30K40K50K60K70K1850190019502000

Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.

Use the left and right arrow keys to inspect population observations.

Population by year

Population estimates for St. Mary Parish. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
202646,131-4210.90%
202546,552-4210.90%
202446,973-2630.56%
202347,236-6641.39%
202247,900-3390.70%
202148,239-9101.85%
202049,149-1450.29%
201949,294-4450.89%
201849,739-9341.84%
201750,673-1,3912.67%

Showing 10 of 34 years.

St. Mary Parish Demographics

39.7median age

Median age

Female40.7 yrs
Male39.2 yrs

Adults

36,131
8,771 seniors (65+) · 24% of adults27,360 other adults

Sex

Female 51.4% · 24,581Male 48.6% · 23,247

Population by age

MaleFemale85+ years, male: 35885+ years, female: 56380–84 years, male: 30580–84 years, female: 77775–79 years, male: 80675–79 years, female: 78970–74 years, male: 1,09070–74 years, female: 1,16165–69 years, male: 1,41865–69 years, female: 1,50460–64 years, male: 2,02660–64 years, female: 1,83955–59 years, male: 1,48755–59 years, female: 1,66250–54 years, male: 1,47050–54 years, female: 1,45945–49 years, male: 1,22145–49 years, female: 1,34940–44 years, male: 1,07640–44 years, female: 1,34235–39 years, male: 1,84835–39 years, female: 1,46330–34 years, male: 1,29230–34 years, female: 1,51325–29 years, male: 1,37525–29 years, female: 1,32420–24 years, male: 1,26020–24 years, female: 1,18415–19 years, male: 1,38615–19 years, female: 1,76710–14 years, male: 1,70910–14 years, female: 1,6675–9 years, male: 1,6375–9 years, female: 1,5300–4 years, male: 1,4830–4 years, female: 1,68885+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–45005001K1K1.5K1.5K

Hover or tap an age group to see exact counts. Use the up and down arrow keys to inspect age groups.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101

Race and ethnicity

Tap a square or a group below to highlight it.

Each square is about 1% of residents (roughly 478 people).

Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002

St. Mary Parish Income

$52,576median household income

Median household income

$52,576

Half of households earn more, half earn less

Median earnings

$39,311

Typical yearly pay for a worker 25 or older.

Poverty rate

20.8%

About 1 in 5 residents

U.S. Census Bureau, 2024 ACS 5-year estimates · Tables S1901, S1501, S1701

St. Mary Parish Marital Status

43% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married43%46%39%
Never married35%37%34%
Divorced12%12%13%
Widowed7%3%12%
Separated3%2%3%

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201

Sources

8 sources, all from the U.S. Census Bureau

Population

American Community Survey, 2024 5-year