31,436 people (2024 Census estimate, −2.4% since 2020)
652 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.
8 active community water systems list Jefferson Davis Parish in the area they serve, reporting 38,275 people served in all (a system that crosses county lines counts its whole population).
| CITY OF JENNINGS WATER SYSTEM groundwater · local government · LA1053003 | 9,837 served |
| JEFF DAVIS WATER AND SEWER COMMISSION 1 groundwater · local government · LA1053014 | 9,780 served |
| JEFF DAVIS CENTRAL WATERWORKS DISTRICT groundwater · local government · LA1053012 | 5,709 served |
| TOWN OF WELSH WATER SYSTEM groundwater · local government · LA1053006 | 4,311 served |
| JEFF DAVIS WATER DISTRICT 4 groundwater · local government · LA1053013 | 4,194 served |
| TOWN OF LAKE ARTHUR WATER SYSTEM groundwater · local government · LA1053005 | 2,706 served |
| TOWN OF ELTON WATER SYSTEM buys groundwater · local government · LA1053001 | 1,512 served |
| VILLAGE OF FENTON WATER SYSTEM groundwater · local government · LA1053007 | 226 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 87 people were held in Jefferson Davis Parish's jail, in Vera's latest figure (2021), or 432 per 100,000 residents ages 15–64. In 2016 it was about 63.
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 Jefferson Davis Parish. School taxes are usually the largest part of a property tax bill.
Spent $94 million — $78.8 million to run schools, about $14,082 per student, plus $13 million on buildings and equipment. Money in: $31.3 million local (mostly property tax), $39 million state, $13.4 million federal. Long-term debt: $38.5 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 Jefferson Davis Parish about $27.7 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively Low; social vulnerability: Relatively High.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
242 bridges in Jefferson Davis Parish: 27 in good condition, 170 fair, and 45 poor (18.6%). “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.
| I0010 over US 165 FRONTAGE RD RR · built 1964 | 27,700 vehicles a day |
| I0010 over US 165 FRONTAGE RD RR · built 1964 | 11,635 vehicles a day |
| US0165 over DRAIN · built 1937 | 4,912 vehicles a day |
| LA0097 over I-10 · built 1964 | 1,175 vehicles a day |
| SOUTH ST. over WELSH DRAINAGE CANAL · built 1983 | 500 vehicles a day |
| EAST NICHOLS ST. over WELSH DRAINAGE CANAL · built 1983 | 500 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $24.9 million of work in Jefferson Davis Parish in fiscal 2025, about $771 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 Jefferson Davis 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 Jefferson Davis Parish built: brayden.ozark@gmail.com.
More of Louisiana: the state government and every county in Louisiana.
Nearby counties: Acadia Parish (24 mi) · Allen Parish (26 mi) · Calcasieu Parish (32 mi) · Cameron Parish (34 mi) · Evangeline Parish (40 mi) · Beauregard Parish (41 mi).