63,672 people (2024 Census estimate, −4.7% since 2020)
872 square miles of land · 73 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 Jefferson County in the area they serve, reporting 84,614 people served in all (a system that crosses county lines counts its whole population).
| LIBERTY UTILITIES groundwater · local government · AR0000272 | 43,438 served |
| GRAND PRAIRIE REGIONAL WATER groundwater · local government · AR0000738 | 16,330 served |
| WATSON CHAPEL WATER ASSOC groundwater · local government · AR0000284 | 5,590 served |
| HARDIN WATER ASSOCIATION buys groundwater · local government · AR0000273 | 4,600 served |
| CENTER GROVE WATER ASSOCIATION groundwater · local government · AR0000213 | 3,858 served |
| REDFIELD WATERWORKS groundwater · local government · AR0000279 | 2,823 served |
| JEFFERSON PUBLIC WATER AUTHORITY groundwater · local government · AR0000276 | 2,551 served |
| ADC - TUCKER UNIT MAINT groundwater · state · AR0000282 | 2,000 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 174 people were held in Jefferson County's jail, in Vera's latest figure (2021), or 415 per 100,000 residents ages 15–64. In 2016 it was about 244.
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.
3 school districts have their office in Jefferson County. School taxes are usually the largest part of a property tax bill.
Spent $65 million — $58.9 million to run schools, about $18,072 per student, plus $3.4 million on buildings and equipment. Money in: $6.6 million local (mostly property tax), $40 million state, $18.3 million federal. Long-term debt: $34.8 million.
Spent $40 million — $31.4 million to run schools, about $10,377 per student, plus $7.3 million on buildings and equipment. Money in: $5.8 million local (mostly property tax), $27.4 million state, $5.6 million federal. Long-term debt: $49.2 million.
Spent $27.9 million — $26.6 million to run schools, about $14,794 per student, plus $535,000 on buildings and equipment. Money in: $1.8 million local (mostly property tax), $19.3 million state, $7.9 million federal. Long-term debt: $6.4 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 Moderate compared with other U.S. counties. FEMA estimates natural hazards cost Jefferson County about $37.1 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively High; social vulnerability: Very High.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
336 bridges in Jefferson County: 233 in good condition, 87 fair, and 16 poor (4.8%). “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.
| US 79-09 LM 5.40 over Big Creek · built 1948 | 3,519 vehicles a day |
| E 8th Street-CS over ImbeauBayou-JeffersonCo · built 1967 | 3,300 vehicles a day |
| PrincetonPikeRd-CR over Bayou Bartholomew · built 1970 | 2,500 vehicles a day |
| Pinebergen Road-CR over Bayou Bartholomew · built 1993 | 841 vehicles a day |
| SH 31-01 LM 1.88 over Waterloo Ditch - Jeff Co · built 1955 | 790 vehicles a day |
| SH 190-05 LM 0.69 over Creek - Jefferson County · built 1955 | 440 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $43.2 million of work in Jefferson County in fiscal 2025, about $642 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.
General election: Tuesday, November 3, 2026. Last day to register to vote: 2026-10-05. Early voting: 2026-10-19 to 2026-11-02. Absentee application due (by mail, email, or fax): 2026-10-27. Absentee ballot hand-delivered by you: last day: 2026-10-30. Election Day — and mailed absentee ballots must arrive: 2026-11-03. Provisional ballot: show your ID by noon: 2026-11-09. General runoff (only where a race needs one): 2026-12-01.
Source: Arkansas Secretary of State, 2026 election calendar · Fayetteville Flyer, Oct. 5, 2026 · sos.arkansas.gov — voting in Arkansas
The budget, property tax rates, audits, local officials and offices for Jefferson County 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 County built: brayden.ozark@gmail.com.
More of Arkansas: the state government and every county in Arkansas.
Nearby counties: Lincoln County (25 mi) · Grant County (28 mi) · Cleveland County (30 mi) · Arkansas County (32 mi) · Lonoke County (33 mi) · Pulaski County (40 mi).