St. John the Baptist Parish's 2026 population is estimated at 39,852, reflecting a 0.2% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). St. John the Baptist Parish is the 27th largest parish in Louisiana. The 2010 population was 45,588 and has grown -12.58% since 2010.
Data after 2023 is projected based on recent change
Overall: 40.1 years
Female: 41.9 years
Male: 37.7 years
There are 30,944 adults, (6,388 of whom are seniors) in St. John the Baptist Parish.
Female: 20,671 (50.7%)
Male: 20,072 (49.3%)
The racial composition of St. John the Baptist Parish includes 56.97% Black or African American, 30.96% White, 4.65% other race, and smaller percentages for Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| Black or African American | 23,210 | 56.97% |
| White | 12,614 | 30.96% |
| Two or more races | 2,516 | 6.18% |
| Other race | 1,893 | 4.65% |
| Asian | 362 | 0.89% |
| Native American | 147 | 0.36% |
| Native Hawaiian or Pacific Islander | 1 | 0% |
St. John the Baptist Parish 's average per capita income is $40,645. Household income levels show a median of $66,630. The poverty rate stands at 14.42%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $96,539 | - |
| Families | $79,306 | $92,690 |
| Households | $66,630 | $80,052 |
| Non Families | $35,259 | $48,980 |
Average Income
Median Household Income
Poverty Rate