29,766 people (2024 Census estimate, −1.0% since 2020)
617 square miles of land · 48 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.
12 active community water systems list Iberville Parish in the area they serve, reporting 40,967 people served in all (a system that crosses county lines counts its whole population).
| CITY OF PLAQUEMINE WATER SYSTEM groundwater · local government · LA1047005 | 14,043 served |
| EAST IBERVILLE WATER SYSTEM buys groundwater · local government · LA1047007 | 6,657 served |
| INTRACOASTAL WATER SYSTEM WEST surface water · local government · LA1047002 | 6,489 served |
| TOWN OF MARINGOUIN groundwater · local government · LA1047003 | 3,300 served |
| INTRACOASTAL WATER SYSTEM EAST groundwater · local government · LA1047030 | 2,940 served |
| TOWN OF WHITE CASTLE WATER SYSTEM groundwater · local government · LA1047009 | 2,550 served |
| NORTH IBERVILLE WATER SYSTEM groundwater · local government · LA1047024 | 1,524 served |
| HIGHWAY 1148 WATER SYSTEM buys groundwater · local government · LA1047026 | 1,086 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 109 people were held in Iberville Parish's jail, in Vera's latest figure (2021), or 559 per 100,000 residents ages 15–64. In 2013 it was about 98.
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 Iberville Parish. School taxes are usually the largest part of a property tax bill.
Spent $116 million — $100.8 million to run schools, about $22,415 per student, plus $10.2 million on buildings and equipment. Money in: $99.9 million local (mostly property tax), $15.5 million state, $18.7 million federal. Long-term debt: $21.3 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 Low compared with other U.S. counties. FEMA estimates natural hazards cost Iberville Parish about $26.8 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Very High; social vulnerability: Relatively High.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
80 bridges in Iberville Parish: 27 in good condition, 43 fair, and 10 poor (12.5%). “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.
| LA0001 over BAYOU PLAQUEMINE · built 1950 | 10,843 vehicles a day |
| LA0076 over STREAM NO NAME · built 1952 | 7,562 vehicles a day |
| LA0077 over Port Allen Lock · built 1961 | 4,376 vehicles a day |
| LA0075 over BAYOU BREAUX · built 1969 | 2,943 vehicles a day |
| LA3066 over CENTENNIAL CANAL · built 1968 | 2,052 vehicles a day |
| LA0997 over B PIGEON/LOWER GRAND R. · built 1957 | 845 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $16.9 million of work in Iberville Parish in fiscal 2025, about $559 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 Iberville 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 Iberville Parish built: brayden.ozark@gmail.com.
More of Louisiana: the state government and every county in Louisiana.
Nearby counties: West Baton Rouge Parish (14 mi) · St. Martin Parish (18 mi) · East Baton Rouge Parish (25 mi) · Ascension Parish (27 mi) · Assumption Parish (31 mi) · Pointe Coupee Parish (33 mi).