18,512 people (2024 Census estimate, −3.9% since 2020)
977 square miles of land · 19 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.
7 active community water systems list Marengo County in the area they serve, reporting 25,983 people served in all (a system that crosses county lines counts its whole population).
| DEMOPOLIS WATER WORKS AND SEWER BOARD groundwater · local government · AL0000908 | 10,530 served |
| LINDEN, THE UB OF THE CITY OF groundwater · local government · AL0000914 | 5,103 served |
| SOUTH MARENGO CO WATER & FIRE PRO AUTH buys surface water · local government · AL0001439 | 4,416 served |
| MYRTLEWOOD WATER SYSTEM groundwater · local government · AL0001506 | 4,095 served |
| THOMASTON WATER WORKS & GAS BOARD groundwater · local government · AL0000919 | 960 served |
| SWEET WATER, THE WW & SB OF THE TOWN OF groundwater · local government · AL0000918 | 465 served |
| FAUNSDALE WATER WORKS groundwater · local government · AL0000909 | 414 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 39 people were held in Marengo County's jail, in Vera's latest figure (2019), or 325 per 100,000 residents ages 15–64. In 2014 it was about 41.
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 Marengo County. School taxes are usually the largest part of a property tax bill.
Spent $31.1 million — $26.3 million to run schools, about $12,758 per student, plus $4.2 million on buildings and equipment. Money in: $8.5 million local (mostly property tax), $17.3 million state, $5 million federal. Long-term debt: $4.6 million.
Spent $17.5 million — $15.8 million to run schools, about $16,598 per student, plus $1.3 million on buildings and equipment. Money in: $5.1 million local (mostly property tax), $9.5 million state, $5.8 million federal. Long-term debt: $3.5 million.
Spent $7.4 million — $7.1 million to run schools, about $16,435 per student, plus $184,000 on buildings and equipment. Money in: $1.9 million local (mostly property tax), $4.5 million state, $2 million federal. Long-term debt: $65,000.
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 Marengo County about $10.4 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively Low; social vulnerability: Very High.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
201 bridges in Marengo County: 121 in good condition, 70 fair, and 10 poor (5.0%). “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.
| SHILOH STREET over SPRINGFIELD CREEK · built 1978 | 400 vehicles a day |
| CO. RT. 564 over BRANCH AT POWELL CRK · built 1957 | 50 vehicles a day |
| CO.RT.560 over BRANCH AT SYCAMORE CRK · built 1959 | 50 vehicles a day |
| CO.RT.435 over BRANCH OF TURKEY CRK · built 1962 | 50 vehicles a day |
| CO.RT.593 over BRANCH AT TURKEY CRK · built 1964 | 50 vehicles a day |
| CO.RT.487 over BRANCH OF SIX MILE CRK · built 1987 | 50 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $5.1 million of work in Marengo County in fiscal 2025, about $266 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 Alabama 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 Marengo 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 Marengo County built: brayden.ozark@gmail.com.
More of Alabama: the state government and every county in Alabama.
Nearby counties: Choctaw County (32 mi) · Wilcox County (33 mi) · Sumter County (34 mi) · Hale County (36 mi) · Clarke County (39 mi) · Perry County (40 mi).