Charleston County, South Carolina demographics
Charleston County, South Carolina (county FIPS 45019) has a median household income of $88,494 (±$1,950) and a total population of 420,264 in the American Community Survey 5-year estimates for 2020-2024.
Margins of error are at the 90% confidence level. The figures describe 2020-2024 (dollars in 2024 dollars), not the present. 31 ZIP Code Tabulation Areas overlap the county (Census 2020).
Data as of Oct 22, 2026 (Olympus publication) · Markdown version
- Values are ACS 5-year estimates for 2020-2024 (dollars in 2024 dollars), not current figures.
- ZCTA-county overlaps come from the Census 2020 relationship file and use 2020 counties, by land area; Connecticut uses its legacy counties, not the planning regions in ACS 2022+.
ACS 5-year estimates, 2020-2024
Census American Community Survey 5-year estimates for 2020-2024, with 90% margins of error as published by the Census Bureau.
| Metric | Estimate | Margin of error (90%) | ACS table |
|---|---|---|---|
| Total population | 420,264 | none (controlled estimate) | B01003 |
| Median age | 39.2 years | ±0.3 years | B01002 |
| Households | 178,975 | ±1,483 | B11001 |
| Median household income (inflation-adjusted to the final ACS year) | $88,494 | ±$1,950 | B19013 |
| Median value of owner-occupied housing units | $489,100 | ±$9,282 | B25077 |
| Median gross rent | $1,620 | ±$36 | B25064 |
| Owner-occupied share of occupied housing units | 63.9% | none (derived from several estimates) | B25003 (derived) |
| Renter-occupied share of occupied housing units | 36.1% | none (derived from several estimates) | B25003 (derived) |
| High school graduate or higher (age 25+) | 93.5% | none (derived from several estimates) | B15003 (derived) |
| Bachelor's degree or higher (age 25+) | 50.3% | none (derived from several estimates) | B15003 (derived) |
| Share of people below the poverty level | 11.3% | none (derived from several estimates) | B17001 (derived) |
| Unemployment rate (civilian labor force) | 3.5% | none (derived from several estimates) | B23025 (derived) |
- Dollar values are in 2024 inflation-adjusted dollars.
- Percentages' margins of error are in percentage points (pp).
Geography
| Measure | Value |
|---|---|
| County FIPS | 45019 |
| Land area | 918.17 sq mi |
| Water area | 448.77 sq mi |
| Population density | 458 per sq mi of land |
| Geography vintage | 2024 Gazetteer |
ZIP codes (ZCTAs) in this county
ZCTAs that overlap the county in the Census 2020 ZCTA to county relationship file, largest share of the county's land first.
| ZCTA | Share of county land | Share of ZCTA land | County is the ZCTA's primary county |
|---|---|---|---|
| 29458 | 12.2% | 100% | Yes |
| 29455 | 10.9% | 100% | Yes |
| 29429 | 9.3% | 100% | Yes |
| 29449 | 8.2% | 100% | Yes |
| 29438 | 7.4% | 90.9% | Yes |
| 29426 | 7.2% | 83.5% | Yes |
| 29470 | 5.2% | 66.2% | Yes |
| 29487 | 4.6% | 100% | Yes |
| 29414 | 4.4% | 82% | Yes |
| 29412 | 4.3% | 100% | Yes |
| 29464 | 3.3% | 100% | Yes |
| 29466 | 3.2% | 100% | Yes |
| 29407 | 1.7% | 100% | Yes |
| 29406 | 1.6% | 97.1% | Yes |
| 29405 | 1.6% | 100% | Yes |
| 29418 | 1.1% | 77.5% | Yes |
| 29451 | 1% | 100% | Yes |
| 29450 | 1% | 5.6% | |
| 29456 | 0.9% | 46.2% | Yes |
| 29403 | 0.6% | 100% | Yes |
| 29404 | 0.6% | 100% | Yes |
| 29420 | 0.4% | 40.5% | |
| 29485 | 0.3% | 6.5% | |
| 29439 | 0.3% | 100% | Yes |
| 29482 | 0.3% | 100% | Yes |
| 29401 | 0.2% | 100% | Yes |
| 29483 | 0% | 0.3% | |
| 29409 | 0% | 100% | Yes |
| 29425 | 0% | 100% | Yes |
| 29424 | 0% | 100% | Yes |
| 29410 | 0% | 0% |
Sources
- American Community Survey 5-year estimates (Census Data API) — U.S. Census Bureau. ACS 5-year 2020-2024 (release acs5-2024:county), source date 2025-09-02. https://api.census.gov/data/2024/acs/acs5?get=NAME,B01003_001E,B01003_001M,B01002_001E,B01002_001M,B11001_001E,B11001_001M,B19013_001E,B19013_001M,B25077_001E,B25077_001M,B25064_001E,B25064_001M,B25003_001E,B25003_002E,B25003_003E,B15003_001E,B15003_017E,B15003_018E,B15003_019E,B15003_020E,B15003_021E,B15003_022E,B15003_023E,B15003_024E,B15003_025E,B17001_001E,B17001_002E,B23025_003E,B23025_005E&for=county:019&in=state:45
- Published by Olympus on Oct 22, 2026.
- Source data: U.S. Census Bureau. Works of the U.S. government are not subject to copyright in the United States.
- This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.
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The same figures, with provenance on every value, from the API (free API key, reference) or from an AI agent through the Olympus MCP server.
curl -s "https://api.olympus.new-odyssey.com/v1/geo-demographics/counties/45019" -H "X-API-Key: $OLYMPUS_API_KEY"get_us_demographics {"county_fips":"45019"}