Morgan City: Demographics & People
Morgan City's population stands at 11,064 people, in 4,114 households. Population shrank 1.3% from 11,208 (2022) to 11,064 (2024). Median age 38.6 years. (1.1y younger than St. Mary Parish; 0.7y older than Louisiana). Children under 18 are 23% of the population. Population is 59% White (non-Hispanic) and 19% Hispanic or Latino. The community is moderately diverse (Simpson index 0.51). 65% of households are family-led. County is losing 68 residents per year (2022-2023). County health: 41% adult obesity, 21% smoke.
- 2.7 people per household (vs Louisiana avg 2.5).
- 35% non-family households (singles, roommates) (vs Louisiana 43%).
- 62 dependents per 100 working-age (youth + seniors / 18-64) (vs Louisiana 67).
Population & Trend
Population shrank 1.3% from 11,208 (2022) to 11,064 (2024). Estimated 2026 population: ~10,922 (extrapolated at -0.6%/yr trend). Census Bureau Vintage estimate: 10,736.
| Census data vintage | 2024 |
|---|---|
| Population | 51,767 people |
| Annual growth rate · Population change | -1.3% |
| Annual growth rate · Population (2022) | 11,208 |
| Annual growth rate · Population (2024) | 11,064 |
| Annual growth rate · Trend category | declining |
| Population | 11,064 people (vs Louisiana 28,561) |
| Population Estimate | 10,736 |
Sources: Census ACS 5-Year 2023, Table B01003 · Refreshed 2026-04-12
Age Distribution
Median age 38.6y is 0.3 years younger than the U.S. median (38.9y). Children under 18 make up 23% — near the U.S. share of ~22%.
| Age Summary · Median age | 38.6 years (vs Louisiana 37.9y) |
|---|---|
| Age Summary · Children Pct | 22.7% |
| Age Summary · Character | family-oriented |
| Age Summary · Total Pop | 11,064 |
| Age Summary · Under 18 | 2,509 |
| Age Summary · 18 To 34 | 2,507.0× |
| Age Summary · 35 To 64 | 4,317.0× |
| Age Summary · 65 Plus | 1,731 |
| Population under 18 | 2,509 |
| Median age | 38.6 years (vs Louisiana 37.9y) |
Sources: Census ACS 5-Year 2024 — place-level B01001 query · Census ACS 5-Year 2023 · Refreshed 2026-04-29
Race, Ethnicity & Diversity
Of 11,064 residents, race / ethnicity breaks down by Census ACS counts (a person can identify with one or more groups). The Simpson diversity index is 0.51 (0 = single group, 1 = perfectly even distribution); this is read as moderately diverse.
| White residents | 7,425 |
|---|---|
| Black residents | 1,948 |
| Asian residents | 181 |
| Hispanic or Latino residents | 1,715 |
| Diversity Index · Diversity index (Simpson) | 51.3% |
| Diversity Index · Diversity label | moderately diverse |
| Diversity Index · Groups counted | 4 |
| Diversity Index · Largest group share | 65.9% |
| Asian population | 1.1% (vs Louisiana 2.1%) |
| Black population | 16.7% (vs Louisiana 42.4%) |
| Hispanic or Latino population | 19.2% (vs Louisiana 6.2%) |
| White (non-Hispanic) population | 58.8% (vs Louisiana 43.1%) |
Sources: Census ACS 5-Year 2023 · Refreshed 2026-04-12
Ancestry
Self-reported ancestry from Census ACS — what residents report as their ethnic origin, separate from race. Counts can exceed population because people can list multiple ancestries.
Top (8)
Citizenship & Origin
Where residents were born and their citizenship status (Census ACS). 1.6% are foreign-born — below the U.S. average of 13.9%. 11% have naturalized to U.S. citizenship.
| Residents born in this state | 8,433 |
|---|---|
| Residents born in another state | 1,272 |
| Share born in this state | 76.2% |
| Share born in another state | 23.8% |
| Native-born U.S. citizens | 11.5% |
| Foreign-born residents | 1.6% |
| Naturalized citizens | 10.6% |
| Total foreign-born residents | 851 |
| From Africa | 120 |
Households & Family Composition
4,114 households. Averaging 2.6 people each — matches the U.S. average of 2.5. 65% are family households — near the U.S. share of ~65%. Of 2,751 families, 21% are married couples with children.
| Children under 18 | 2,699 |
|---|---|
| Total families | 2,751 |
| Married couples with children | 585 |
| Single-parent households | 128 |
| Average household size | 2.56 |
| Women who gave birth (past year) | 13.2% |
| Grandparents living with grandchildren | 345 |
| Grandparents responsible for grandchildren | 90 |
| Family households | 2,675 households (vs Louisiana 7,441) |
| Households that are families | 65.0% (vs Louisiana 57.0%) |
| Total households | 4,114 households (vs Louisiana 11,381) |
Sources: Census ACS 5-Year 2023 · Refreshed 2026-04-12
Residential Stability & Migration
How long residents have lived here and where they came from. 12.2% moved within the county in the past year — the U.S. baseline is roughly 8–10%. The surrounding county is losing 68 residents per year on net (IRS migration data).
| Moved within the county (past year) | 12.2% |
|---|---|
| Migration · People moving in (annual) | 46,056 |
| Migration · People moving out (annual) | 46,124 |
| Migration · Net migration (in − out) | -68 |
| Migration · Year | 2022-2023 |
Sources: IRS SOI Migration 2021-2022 · Refreshed 2026-04-12
Disability
Census ACS measures self-reported functional limitations — vision, hearing, mobility, cognitive, self-care, or independent-living. The U.S. baseline disability rate is about 12–13%; rates trend higher with median age.
| Residents with a disability | 1,120 |
|---|---|
| Disability rate | 10.0% |
Group Quarters
Group quarters are non-household living arrangements counted by the Census — college dormitories, nursing homes, military barracks, group homes, correctional facilities, and similar institutional or shared housing. 145 residents live in group quarters (1.3% of population).
| Living in group quarters | 145 |
|---|
Veterans
| Veterans Services · Total count | 1 |
|---|
Sources: IRS BMF keyword
Other
| Congressional District · District | 6 |
|---|---|
| Congressional District · Congress | 118th |
| Cdc Birth Rate · Fips | 22099 |
| Cdc Birth Rate · State Fips | 22 |
| Cdc Birth Rate · County Fips | 099 |
| Cdc Birth Rate · County | St Martin |
| Cdc Birth Rate · Birth Rate | 31.2% |
| Cdc Birth Rate · Lower Ci | 27.10 |
| Cdc Birth Rate · Upper Ci | 35.60 |
| Cdc Mortality · Fips | 22099 |
| Cdc Mortality · County | St. Martin Parish |
| Cdc Mortality · Urban Rural | Medium metro |
| Cdc Mortality · Total Deaths 2020 2023 | 1,320 |
| Cdc Vaccination · Fips | 22099 |
| Cdc Vaccination · County | St. Martin Parish |
| Cdc Vaccination · Dose1 Pop Pct | 46.0% |
| Cdc Vaccination · Series Complete Pct | 41.3% |
| Cdc Vaccination · Booster Pct | 41.9% |
| Cdc Vaccination · Population 2019 | 53,431 |
| Cdc Vaccination · Metro Status | Metro |
| Family Score · Score | 6.20 |
| Family Score · Schools | 8 |
| Family Score · Childcare Centers | 4 |
| Family Score · Children Pct | 22.7% |
| Family Score · Rating | good |
| Town Summary · Key Facts | population 11,064, declining, family-oriented, middle-class, mixed |
| Town Summary · Population | 11,064 people (vs Louisiana 28,561) |
| Town Summary · County | St. Martin Parish |
Sources: NCES school congressional district assignment · federal dataset cascade