103,864 people (2024 Census estimate, −5.1% since 2020)
1,230 square miles of land · 84 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.
2 active community water systems list Terrebonne Parish in the area they serve, reporting 128,118 people served in all (a system that crosses county lines counts its whole population).
| SCHRIEVER WATER TREATMENT SERVICE AREA surface water · local government · LA1109002 | 116,460 served |
| HOUMA WATER TREATMENT SERVICE AREA surface water · local government · LA1109001 | 11,658 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 546 people were held in Terrebonne Parish's jail, in Vera's latest figure (2023), or 833 per 100,000 residents ages 15–64. In 2018 it was about 659.
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 Terrebonne Parish. School taxes are usually the largest part of a property tax bill.
Spent $239.3 million — $214.7 million to run schools, about $13,614 per student, plus $18.4 million on buildings and equipment. Money in: $98.5 million local (mostly property tax), $92.6 million state, $93.6 million federal. Long-term debt: $152.8 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 Terrebonne Parish about $140.7 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.
214 bridges in Terrebonne Parish: 91 in good condition, 101 fair, and 22 poor (10.3%). “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.
| N. HOLLYWOOD RD over DRAIN CANAL · built 1965 | 13,934 vehicles a day |
| LA0182 over BAYOU TERREBONNE · built 1968 | 9,001 vehicles a day |
| LA0024 over CO. CANAL (BOURG) · built 1951 | 8,645 vehicles a day |
| LA0315 over PROVOST BAYOU · built 1953 | 6,715 vehicles a day |
| LA0058 over DRAINAGE CANAL · built 1966 | 5,194 vehicles a day |
| MOFFET RD over CHAUVIN BAYOU · built 1979 | 5,123 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $45.2 million of work in Terrebonne Parish in fiscal 2025, about $413 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 Terrebonne 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 Terrebonne Parish built: brayden.ozark@gmail.com.
More of Louisiana: the state government and every county in Louisiana.
Nearby counties: Lafourche Parish (29 mi) · Assumption Parish (41 mi) · St. Mary Parish (43 mi) · St. James Parish (48 mi) · St. Charles Parish (49 mi) · Jefferson Parish (50 mi).