29821 ZIP Code, Clarks Hill, SC
29821 is a ZIP code in Clarks Hill, South Carolina — mostly in Edgefield County (53% of its land), with smaller parts in McCormick County. It covers 55 square miles of land. The closest ZIP codes are 30809, 29860 and 29838. 1,141 people live here in 336 households. It is rural, with fewer than 100 people per square mile, and most homes are owner-occupied (94%). Median household income is $81,000, above the South Carolina median of $69,324.
Quick facts
- Mailing city: Clarks Hill, SC
- County: Edgefield County
- Land area: 55 sq mi
- Population: 1,141
- Median household income: $81,000
- Carrier routes: 2 (652 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 1,141 |
| Households | 336 |
| Median household income | $81,000 |
| Income per person | $26,464 |
| Median age | 39.5 |
| Homeowners | 94.0% |
| Median home value | $277,800 |
| Median rent | not published |
| Bachelor's degree or higher | 15.3% |
| Average commute (minutes) | 26.8 |
| Households with kids under 18 | 36.6% |
| Moved in the past year | 3.1% |
| Below the poverty line | 30.9% |
| Broadband internet | 88.4% |
| Speak a non-English language at home | 0.0% |
Household income
| % of households | Value |
|---|---|
| <$10K | 1.5% |
| $10–15K | 5.4% |
| $15–25K | 5.4% |
| $25–35K | 13.4% |
| $35–50K | 9.2% |
| $50–75K | 13.4% |
| $75–100K | 16.7% |
| $100–150K | 18.2% |
| $150–200K | 16.1% |
| $200K+ | 0.9% |
Age
| % of all residents | Value |
|---|---|
| <10 | 6.8% |
| 10–19 | 15.2% |
| 20–24 | 11.4% |
| 25–34 | 14.7% |
| 35–44 | 10.7% |
| 45–54 | 5.3% |
| 55–64 | 13.3% |
| 65–74 | 10.1% |
| 75+ | 12.5% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 21.7% |
| Owned outright | 37.9% |
| Rented | 3.8% |
| Vacant | 36.6% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 47.7% |
| Townhome | 1.1% |
| 2–4 units | 0.0% |
| 5–19 units | 0.0% |
| 20+ units | 0.0% |
| Mobile / other | 51.1% |
Businesses in 29821
13 business establishments with 66 employees (ZIP Codes Business Patterns 2023).
- Administrative and Support and Waste Management and Remediation Services: 3
EDDM carrier routes
29821 has 2 USPS carrier routes with 652 residential and 16 business mailboxes. Open the EDDM route map.
Carrier routes in 29821
29821 has 2 USPS carrier routes (2 rural (R)) with 652 residential and 16 business mailboxes. Routes range from 42 homes (R032) to 610 homes (R031); the median route has 326 homes. The Census counted 336 households in 29821 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 1 |
| 250–499 | 0 |
| 500–749 | 1 |
| 750–999 | 0 |
| 1,000–1,499 | 0 |
| 1,500+ | 0 |
Best routes in 29821 for…
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route R031 — USPS business mailboxes 11, 610 homes
- Route R032 — USPS business mailboxes 5, 42 homes
Select these 2 routes on the route map
Every carrier route in 29821
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| R031 | Rural | 610 | 11 | $62,411 | — | — | — |
| R032 | Rural | 42 | 5 | $62,411 | — | — | — |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 29821 on the EDDM route map.
How route demographics are estimated
Mailbox counts come from USPS; demographics are estimates
The number of homes and businesses on each carrier route is the current USPS EDDM count. The Census Bureau does not publish figures for carrier routes, so income, homeownership, ages, families, movers and housing age on a route are EDDM2GO estimates built from Census block groups (neighborhood areas of roughly 600 to 3,000 people).
How a route gets its figures: the block-group length-share method
We trace each route's streets every 25 meters and record which block group each stretch falls in. The route's homes are spread along its streets in proportion to length, so a route with 60% of its street length in one block group is assumed to have 60% of its homes there. Each block group then contributes its Census counts in proportion to the share of its housing units that sit on the route (capped at the whole block group). Medians are recalculated from the combined income, home-value and age brackets, the way the Census Bureau computes them, not averaged.
Margins of error
Census survey figures carry a margin of error at 90% confidence; we carry it through the calculation and show it as ±. Our margins treat the route-to-block-group split as exact, so the real uncertainty is larger. Routes with fewer than 100 estimated households, large margins, or streets we could not place are flagged.
Different years
USPS mailbox counts are current. Census figures are 5-year averages for 2020–2024, so a new subdivision may have more homes on the route today than the Census counted. Use the route figures to compare routes with each other, not as an exact head count.
Why some routes show identical figures
Two routes that run through the same block group get the same percentages and medians, because the Census publishes one set of figures for the whole block group. Their mailbox counts still differ, and those are exact.
Route and mailbox counts: USPS EDDM route data. Route demographics: EDDM2GO estimates from U.S. Census Bureau American Community Survey 5-year block-group data (2020–2024) and 2024 cartographic block-group boundaries. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.
Nearby ZIP codes
- 30809 — Evans CDP, GA (6.3 mi)
- 29860 — North Augusta city, SC (7.7 mi)
- 29838 — Modoc CDP, SC (7.9 mi)
- 30907 — Martinez CDP, GA (8 mi)
- 30802 — Appling CDP, GA (10.9 mi)
- 30909 — Augusta-Richmond County consolidated government (balance), GA (11.6 mi)
- 29844 — Parksville town, SC (11.7 mi)
- 30904 — Augusta-Richmond County consolidated government (balance), GA (12.4 mi)
Areas that include 29821
- Clarks Hill, SC ZIP codes — 1 ZIP code
- Edgefield County ZIP codes — 8 ZIP codes
- McCormick County ZIP codes — 9 ZIP codes
- South Carolina ZIP code data
Where it ranks
- No. 2 of 7: highest median household income in Edgefield County
- No. 1 of 7: highest median home value in Edgefield County
- No. 1 of 7: highest share of owner-occupied homes in Edgefield County
- No. 2 of 7: highest share of households with children in Edgefield County
- No. 2 of 7: lowest median age in Edgefield County
Mail every home in 29821
Route counts on this page price as Full Service 6.5 × 9 postcards: we print, bundle by carrier route and hand the mailing to USPS. Prefer to take it to the Post Office yourself? Print only costs less and you pay postage at drop-off.
EDDM guides
ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 29821, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 29821 in?
- 29821 is a Clarks Hill, SC mailing address. By land area, 6% lies inside Clarks Hill; the rest is outside any Census-defined city or community.
- What county is 29821 in?
- 29821 is mostly in Edgefield County (53% of its land), with smaller parts in McCormick County.
- What is the population of 29821?
- About 1,141 people (±427), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 1,368.
- What is the median household income in 29821?
- $81,000 (±$20,627), compared with $69,324 for South Carolina as a whole. Half the households in the ZIP code earn more and half earn less.
- How many carrier routes and mailboxes are in 29821?
- 2 USPS carrier routes with 652 residential and 16 business mailboxes (668 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 29821?
- The closest, measured center to center: 30809 (6.3 mi, Evans), 29860 (7.7 mi, North Augusta), 29838 (7.9 mi, Modoc), 30907 (8 mi, Martinez), 30802 (10.9 mi, Appling) and 30909 (11.6 mi, Augusta-Richmond County consolidated government (balance), GA).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.