22,501 people (2024 Census estimate, −0.8% since 2020)
762 square miles of land · 30 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.
10 active community water systems list Allen Parish in the area they serve, reporting 32,229 people served in all (a system that crosses county lines counts its whole population).
| SOUTHWEST ALLEN WW DISTRICT NO 2 groundwater · local government · LA1003009 | 8,106 served |
| CITY OF OAKDALE WATER SYSTEM groundwater · local government · LA1003006 | 6,114 served |
| WEST ALLEN PARISH WATER SYSTEM groundwater · local government · LA1003010 | 3,582 served |
| TOWN OF KINDER WATER SYSTEM buys groundwater · local government · LA1003005 | 3,195 served |
| EAST ALLEN PARISH WATER WORKS groundwater · local government · LA1003011 | 3,030 served |
| TOWN OF OBERLIN WATER SYSTEM groundwater · local government · LA1003007 | 2,730 served |
| NORTHWEST ALLEN PARISH WW DISTRICT groundwater · local government · LA1003003 | 1,767 served |
| SOUTH OAKDALE WATER SYSTEM groundwater · private · LA1003008 | 1,434 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 65 people were held in Allen Parish's jail, in Vera's latest figure (2021), or 437 per 100,000 residents ages 15–64. In 2016 it was about 66.
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 Allen Parish. School taxes are usually the largest part of a property tax bill.
Spent $64.7 million — $60.8 million to run schools, about $14,694 per student, plus $3 million on buildings and equipment. Money in: $24.8 million local (mostly property tax), $31.8 million state, $10.1 million federal. Long-term debt: $22.4 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 Allen Parish about $14 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.
178 bridges in Allen Parish: 26 in good condition, 130 fair, and 22 poor (12.4%). “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.
| US0190 over WEST CALCASIEU RIVER REL · built 1980 | 3,923 vehicles a day |
| US0190 over WEST CALCASIEU RIVER REL · built 1980 | 3,923 vehicles a day |
| US0190 over BEAR CREEK · built 1991 | 3,263 vehicles a day |
| LA0026 over CREEK · built 1968 | 2,151 vehicles a day |
| LA0026 over CREEK · built 1968 | 1,931 vehicles a day |
| LA0026 over CREEK · built 1968 | 1,931 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $25.8 million of work in Allen Parish in fiscal 2025, about $1,135 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 Allen 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 Allen Parish built: brayden.ozark@gmail.com.
More of Louisiana: the state government and every county in Louisiana.
Nearby counties: Evangeline Parish (25 mi) · Jefferson Davis Parish (26 mi) · Beauregard Parish (31 mi) · Acadia Parish (35 mi) · Vernon Parish (38 mi) · Rapides Parish (41 mi).