31,030 people (2024 Census estimate, +0.6% since 2020)
607 square miles of land · 51 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.
9 active community water systems list Clarendon County in the area they serve, reporting 17,571 people served in all (a system that crosses county lines counts its whole population).
| MANNING CITY OF (SC1410002) groundwater · local government · SC1410002 | 7,632 served |
| CLARENDON CO W&S HWY 260 (SC1450013) groundwater · local government · SC1450013 | 3,521 served |
| SUMMERTON TOWN OF (SC1410003) groundwater · local government · SC1410003 | 2,096 served |
| BARRINEAU WATER SYSTEM (SC1420002) groundwater · local government · SC1420002 | 1,879 served |
| TURBEVILLE TOWN OF (SC1410004) groundwater · local government · SC1410004 | 735 served |
| GIN POND SHORES WATER CO (SC1450005) groundwater · private · SC1450005 | 664 served |
| WYBOO WATER DEPT INC (SC1450009) groundwater · private · SC1450009 | 618 served |
| NORTH SHORE WATER SYS (SC1470863) groundwater · private · SC1470863 | 272 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 55 people were held in Clarendon County's jail, in Vera's latest figure (2019), or 285 per 100,000 residents ages 15–64. In 2014 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.
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 Clarendon County about $23.4 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.
170 bridges in Clarendon County: 31 in good condition, 132 fair, and 7 poor (4.1%). “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.
| S-14-56 over TAWCAW CREEK · built 1956 | 750 vehicles a day |
| S-14-40 over BLACK RIVER · built 1971 | 550 vehicles a day |
| S-14-50 over TEARCOAT BRANCH · built 1974 | 425 vehicles a day |
| S-14-307 over BROADWAY BRANCH · built 1964 | 350 vehicles a day |
| S-14-307 over SAMMY SWAMP · built 1964 | 350 vehicles a day |
| S-14-106 over HORSE BRANCH · built 1952 | 275 vehicles a day |
Source: Federal Highway Administration, National Bridge Inventory (2025 submission). Includes state, county and city bridges.
Federal grants paid for $225 million of work in Clarendon County in fiscal 2025, about $7,223 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 South Carolina 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 Clarendon 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 Clarendon County built: brayden.ozark@gmail.com.
More of South Carolina: the state government and every county in South Carolina.
Nearby counties: Sumter County (20 mi) · Williamsburg County (29 mi) · Calhoun County (32 mi) · Lee County (34 mi) · Berkeley County (35 mi) · Orangeburg County (37 mi).