| ZIP Codes: | 7 ZIP Codes (5 Standard, 2 PO Box, 0 Unique) [See All] |
| Area Codes: | 843 / 854 |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 2:13:39 PM |
| Population: | 60,258 [See All] |
| FIPS: | 45031 |
| CBSA: | Florence, SC |
| Land Area: | 621 sq mi |
| Water Area: | 7 sq mi |
| Coordinates: | 34.3466, -79.9866 |
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60,258 residents live across 7 ZIPs covering 621 sq mi, served by 5 distinct USPS-recognized cities.
Population moved from 64,854 to 60,258 from 2014 to 2024 — a -7.1% change. 1 ZIPs gained residents, 5 lost.
The county's wealthiest ZIP 29540 (Darlington, $53,155 median) and poorest ZIP 29593 (Society Hill, $40,568) are 7.9 miles apart — a 1.3× income gap across local geography.
Median home values vary 1.9× across this county — from $95,300 in 29540 (Darlington) to $179,300 in 29550 (Hartsville).
Density varies 9× across the county — from 18 people/sq mi in 29593 (Society Hill) to 164 in 29532 (Darlington).
Educational attainment ranges from 10.1% bachelor's+ in 29540 (Darlington) to 24.7% in 29550 (Hartsville) — the breadth of educational profiles across the area.
Within South Carolina, this is the #21 most populous of 46 counties and ranks #37 for median household income .
Weighted by population, the typical household earns about $48,746 across the county — reflecting what a typical resident sees, not a simple ZIP average.
19.7% of adults age 25+ hold a bachelor's degree or higher (8,110 of 41,145 reporting).
5 Standard delivery, 2 PO Box only, 0 single-entity Unique ZIPs serve this county.
A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.
Darlington County lost 7.1% of residents between 2014 and 2024. ZIPs that shed the largest share:
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 29550 | Hartsville | Standard | 29,924 | $51,491 | 218.3 | -5.3% |
| 29532 | Darlington | Standard | 19,857 | $44,482 | 120.8 | -1.1% |
| 29069 | Lamar | Standard | 4,647 | $48,393 | 77.7 | -9.5% |
| 29540 | Darlington | Standard | 4,080 | $53,155 | 110.2 | -30.3% |
| 29593 | Society Hill | Standard | 1,692 | $40,568 | 94.3 | -21.9% |
| 29079 | Lydia | PO Box | 58 | — | 0.0 | 56.8% |
| 29551 | Hartsville | PO Box | — | — | 0.0 | — |