39,694 people (2024 Census estimate, −6.3% since 2020)
214 square miles of land · 185 people per square mile
“Highest” and “lowest” are just order, not grades: a high rank for poverty or hazard losses means more of it. Each figure's source is in its section below.
4 active community water systems list St. John the Baptist Parish in the area they serve, reporting 46,679 people served in all (a system that crosses county lines counts its whole population).
| ST JOHN WATER DISTRICT 3 groundwater · local government · LA1095007 | 31,965 served |
| ST JOHN WATER DISTRICT 1 surface water · local government · LA1095003 | 10,484 served |
| ST JOHN WATER DISTRICT 2 surface water · local government · LA1095002 | 3,702 served |
| PLEASURE BEND WATER SUPPLY groundwater · local government · LA1095006 | 528 served |
Source: U.S. EPA Safe Drinking Water Information System (SDWIS), active community systems, . Look up any system's violations and test results with EPA's search using its ID.
About 74 people were held in St. John the Baptist Parish's jail, in Vera's latest figure (2021), or 270 per 100,000 residents ages 15–64. In 2016 it was about 187.
Source: Vera Institute of Justice, Incarceration Trends (built from federal Bureau of Justice Statistics jail surveys). Counties without their own jail, or that share one, may show no figure.
1 school district has its office in St. John the Baptist Parish. School taxes are usually the largest part of a property tax bill.
Spent $114.5 million — $104.6 million to run schools, about $19,438 per student, plus $5.2 million on buildings and equipment. Money in: $73.5 million local (mostly property tax), $28.3 million state, $26.3 million federal. Long-term debt: $93.9 million.
Source: U.S. Census Bureau, 2023 Annual Survey of School System Finances. Districts are listed by the county of their main office; some serve neighboring counties too.
Source: County Health Rankings & Roadmaps 2025 (University of Wisconsin Population Health Institute), which gathers federal data (CDC, Census, and others); measures cover different recent years. Blank lines aren't reported for small counties.
Overall risk: Relatively Moderate compared with other U.S. counties. FEMA estimates natural hazards cost St. John the Baptist Parish about $46.4 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Very High; social vulnerability: Relatively Moderate.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
40 bridges in St. John the Baptist Parish: 13 in good condition, 26 fair, and 1 poor (2.5%). “Poor” means a main part — the deck, the beams, or the supports — is rated 4 or lower on the federal 0–9 scale. It doesn't mean unsafe to drive; unsafe bridges are closed.
| Hope Canal Rd over HOPE CANAL · built 1965 | 0 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $39.1 million of work in St. John the Baptist Parish in fiscal 2025, about $921 per resident — to the county, cities, schools, hospitals, nonprofits and others.
Source: USAspending.gov, grants by place of performance, fiscal 2025 (Oct. 2024 to Sept. 2025). Search it by county to see each award.
From Grants.gov: posted grants listing county governments as eligible, soonest deadline first; research-only and overseas programs left out; list updated 2026-10-13, refreshed weekly. 62 are open in all. Cities, towns, school districts and nonprofits have their own lists there.
Registration deadlines, early voting and polling places for Louisiana are on the federal site vote.gov, which links to the state's official election office.
The budget, property tax rates, audits, local officials and offices for St. John the Baptist Parish come from the county's own records, which we haven't gathered — not gathered, never hidden. See what a full county site looks like, or ask to have St. John the Baptist Parish built: brayden.ozark@gmail.com.
More of Louisiana: the state government and every county in Louisiana.
Nearby counties: St. Charles Parish (18 mi) · St. James Parish (20 mi) · Livingston Parish (25 mi) · Ascension Parish (26 mi) · Tangipahoa Parish (33 mi) · Orleans Parish (34 mi).