770,307 people (2024 Census estimate, +0.7% since 2020)
268 square miles of land · 2,878 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 DeKalb County in the area they serve, reporting 1,832,893 people served in all (a system that crosses county lines counts its whole population).
| ATLANTA surface water · local government · GA1210001 | 1,089,893 served |
| DEKALB COUNTY surface water · local government · GA0890001 | 743,000 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 1,922 people were held in DeKalb County's jail, in Vera's latest figure (2026). In 2021 it was about 1,406.
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.
2 school districts have their office in DeKalb County. School taxes are usually the largest part of a property tax bill.
Spent $1.5 billion — $1.4 billion to run schools, about $15,369 per student, plus $61.8 million on buildings and equipment. Money in: $1 billion local (mostly property tax), $575 million state, $192.2 million federal. Long-term debt: $135 million.
Spent $99.1 million — $95.8 million to run schools, about $16,939 per student, plus $2.3 million on buildings and equipment. Money in: $65.5 million local (mostly property tax), $36.4 million state, $3.6 million federal.
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 DeKalb County about $153.3 million a year on average in buildings, crops and lives. Ability to bounce back (community resilience): Relatively Low; social vulnerability: Relatively Low.
Source: FEMA National Risk Index (December 2025), expected annual loss. Ratings compare counties nationwide; they're estimates, not predictions.
392 bridges in DeKalb County: 291 in good condition, 97 fair, and 4 poor (1.0%). “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.
| HOUSTON MILL ROAD over S FORK PEACHTREE CREEK · built 1958 | 12,400 vehicles a day |
| CEDAR GROVE ROAD over NS RAILROAD · built 1965 | 11,000 vehicles a day |
| PRESIDENTIAL DRIVE over N FORK PEACHTREE CREEK · built 1967 | 2,047 vehicles a day |
| STOKES ROAD over ST. MARYS RIVER · built 1978 | 110 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $1.3 billion of work in DeKalb County in fiscal 2025, about $1,695 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 Georgia 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 DeKalb 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 DeKalb County built: brayden.ozark@gmail.com.
More of Georgia: the state government and every county in Georgia.
Nearby counties: Fulton County (14 mi) · Rockdale County (14 mi) · Gwinnett County (17 mi) · Clayton County (18 mi) · Henry County (22 mi) · Cobb County (23 mi).