Residential delivery area · South Carolina
ZIP Code 29678: Seneca, SC
ZIP code 29678 uses the postal name Seneca, South Carolina and lies entirely in Oconee County (Census 2020 ZIP-county file). About 24,000 people live there (Census Bureau, ACS 2020-2024), the more populous of Seneca's 2 residential ZIP codes. Median household income is $52,550 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Seneca (8%) and Utica (1%); 90% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Seneca · 2 residential ZIPs
- County
- Oconee County
- Census places
- Seneca (8%); Utica (1%) census-designated place
- Neighborhoods
- Bishop Heights, Doris Heights, Southern Meadows, Springbrook, Thriftwood, Walnut Grove and 2 more GeoNames
- Micro area
- Seneca, SC
- House district
- SC-3 119th Congress
- State
- South Carolina
- Time zone
- Eastern
- Land area
- 79.8 sq mi · 298 people per sq mi
- PO Box ZIPs
- 29679 also use the name Seneca
Where is ZIP code 29678?
29678 centers on 34.634°, -82.937° and covers 79.8 square miles of land plus 7.6 of water. It borders 8 ZIP codes: 29634, 29631, 29689, 29672, 29643, 29625, 29670, 29693.
The map draws ZIP code areas only. For the streets inside 29678, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0); neighborhoods from the GeoNames gazetteer (CC BY 4.0), placed in this ZIP code by PlainZIP.
How does 29678 compare with the rest of Seneca?
| Measure | 29678 | In Seneca | In Oconee County | In SC |
|---|---|---|---|---|
| People (ACS 2020-2024) | 23,767 | 1st of 2 | 1st of 13 | 82nd of 424 |
| Median household income | $53k | 2nd of 2 | 5th of 5 | 188th of 265 |
| Median home value | $226k | 2nd of 2 | 4th of 6 | 114th of 260 |
Its median household income is higher than in 18% of U.S. residential ZIP codes, and it is denser than 67% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 29678?
The 2020 Census counted 23,700 people in 29678; the ACS, which samples households over 2020-2024, estimates 23,767. Between the 2010 and 2020 censuses its population grew 9.3% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 23,767
- 2020 Census count
- 23,700+9.3% since 2010 (21,676)
- Households
- 10,394
- Median age
- 38.4
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 29678?
Of the 23,767 people the ACS estimates in 29678, 20.7% are under 18 and 17.4% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (75.7%), then Black (not Hispanic) (14.3%).
- Under 1820.7%
- 18 to 6461.9%
- 65 and older17.4%
- White, not Hispanic75.7%
- Black, not Hispanic14.3%
- Hispanic or Latino4.8%
- Other or two or more4.2%
- Asian, not Hispanic0.9%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 29678 earn?
Median household income is $52,550 (ACS 2020-2024), the 5th highest of the 5 ranked ZIP codes in Oconee County. It is not measurably different from 2015-2019 ($56,601 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $52,550
- Income per person
- $32,407
- Below the poverty line
- 22.3%
- Unemployed (of the labor force)
- 8.3%
- Adults 25+ with a bachelor's degree
- 24.3%
- Adjusted gross income per tax return, 2022
- $59,0549,960 returns; wages 70% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 29678?
FHFA's house price index for 29678, built from repeat sales and appraisals of the same homes, rose 109% from 2015 to 2025 and rose 63% from 2020 to 2025, and moved −0.2% in 2025.
- Median home value (owners' estimate)
- $225,500
- Median gross rent
- $913
- Homes owned by their occupants
- 63.1%
- Housing units
- 11,819
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 29678?
741 business establishments had a location in this ZIP code in 2023, 70 more than in 2018; the most are in retail trade (ZIP Code Business Patterns).
- Retail trade153
- Accommodation and food services81
- Other services (except public administration)79
- Health care and social assistance76
- Construction72
- Finance and insurance71
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 29678?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 29634 | Clemson | 6,048 | – | 6.5 mi |
| 29631 | Clemson | 16,849 | $49k | 7.5 mi |
| 29689 | Townville | 4,057 | $73k | 7.6 mi |
| 29672 | Seneca | 12,750 | $91k | 8.1 mi |
| 29643 | Fair Play | 2,751 | $81k | 9.0 mi |
| 29625 | Anderson | 28,012 | $62k | 11.2 mi |
| 29670 | Pendleton | 11,084 | $72k | 12.2 mi |
| 29693 | Westminster | 15,114 | $55k | 12.4 mi |
| 29665 | Newry | 412 | $45k | 6.4 mi (near) |
| 29630 | Central | 15,982 | $55k | 10.7 mi (near) |
| 29696 | West Union | 5,154 | $79k | 10.9 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.