22,289 people (2024 Census estimate, −5.0% since 2020)
781 square miles of land · 29 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 Plaquemines Parish in the area they serve, reporting 32,082 people served in all (a system that crosses county lines counts its whole population).
| BELLE CHASSE WATER DISTRICT surface water · local government · LA1075001 | 19,644 served |
| PORT SULPHUR WATER DISTRICT surface water · local government · LA1075006 | 10,308 served |
| DALCOUR WATERWORKS DISTRICT surface water · local government · LA1075004 | 1,248 served |
| POINTE A LA HACHE WATER SYSTEM surface water · local government · LA1075005 | 882 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 528 people were held in Plaquemines Parish's jail, in Vera's latest figure (2023), or 3,614 per 100,000 residents ages 15–64. In 2017 it was about 570.
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 Plaquemines Parish. School taxes are usually the largest part of a property tax bill.
Spent $78.9 million — $75.8 million to run schools, about $19,657 per student, plus $2.2 million on buildings and equipment. Money in: $74.5 million local (mostly property tax), $13.2 million state, $11.4 million federal.
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 Low compared with other U.S. counties. FEMA estimates natural hazards cost Plaquemines Parish about $28.1 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.
35 bridges in Plaquemines Parish: 6 in good condition, 22 fair, and 7 poor (20.0%). “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.
| GRAVOLET RD over DRAINAGE CANAL · built 1968 | 150 vehicles a day |
| Point ala Hache Fe over MISS. RIVER FERRY RAMP · built 1960 | 50 vehicles a day |
| Point ala Hache Fe over MISS. RIVER FERRY RAMP · built 1960 | 50 vehicles a day |
| ENGLISH TURN RD over MISSISSIPPI RIVER · built 2002 | 0 vehicles a day |
| Avenue G over MISSISSIPPI RIVER · built 2002 | 0 vehicles a day |
| MARTIN LN over DRAINAGE CANAL · built 1987 | 0 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $39.9 million of work in Plaquemines Parish in fiscal 2025, about $1,699 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 Plaquemines 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 Plaquemines Parish built: brayden.ozark@gmail.com.
More of Louisiana: the state government and every county in Louisiana.
Nearby counties: Jefferson Parish (32 mi) · St. Bernard Parish (48 mi) · Lafourche Parish (51 mi) · Orleans Parish (57 mi) · St. Charles Parish (64 mi) · Terrebonne Parish (76 mi).