29678 ZIP Code — Seneca, SC

Oconee County, South Carolina

ZIP code 29678 is located in Seneca, South Carolina, within Oconee County. It covers approximately 79.77 square miles and serves a population of 23,359 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 864.

About ZIP code 29678

The housing stock consists of a higher-than-average concentration of mobile homes. Most homes were built in the 1990s, giving the area an established character. Median home value is $182,900. Owner-occupancy sits near the national average at 62%.

Median household income is $45,665. Poverty affects 21% of residents, above the national average. 34% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 23 minutes is near the national average.

Educational attainment is near the national average, with 23% of residents holding a bachelor's degree or higher.

Health indicators show elevated rates of smoking (20%) compared to national benchmarks.

Overall, ZIP code 29678 reflects a community defined by economic challenges above the national average and a significant Social Security-dependent population.

23,359

population

79.77

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

29678 ZIP code map

Cities in ZIP code 29678

Below are the cities the US Postal Service accepts for ZIP code 29678. Using any city not on this list may result in mail delivery delays.

City	Status
Seneca	Preferred

Nearby ZIP codes

29632 Clemson (7 mi) 29643 Fair Play (7.3 mi) 29689 Townville (7.3 mi) 29631 Clemson (8 mi) 29634 Clemson (8.1 mi) 29672 Seneca (9.7 mi) 29625 Anderson (10.5 mi) 29630 Central (11.3 mi) 29693 Westminster (11.3 mi) 29696 West Union (12.5 mi) 29670 Pendleton (12.6 mi) 29667 Norris (14.4 mi)

Demographics updated 05/2026

Population
Total population	23,359
Population density	293 / sq mi
State FIPS	45
County FIPS	073

Geography
Land area	79.77 sq mi
Water area	7.55 sq mi
Latitude	34.6146
Longitude	-82.9332
Timezone	Eastern (ET)
Area code	864

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	55.0%	50.0%	45.8%
$50k – $100k	28.9%	28.2%	30.5%
$100k – $200k	14.5%	17.1%	18.6%
Over $200k	1.7%	4.7%	5.1%

Demographics & statistics

23,359

Population

293

People per sq mi

38.5

Median age

$45,665

Median household income

$28,250

Per capita income

$182,900

Median home value

$936

Median monthly rent

62.4%

Home ownership

20.8%

Poverty rate

7.2%

Unemployment

7,821

Housing units

22.6%

Bachelor's or higher

Age distribution

Male Female

637

Under 5

695

667

5–9

729

680

10–14

743

795

15–19

868

832

20–24

909

1,611

25–34

1,758

1,046

35–44

1,142

1,309

45–54

1,428

843

55–59

920

811

60–64

885

1,124

65–74

1,228

618

75–84

675

194

85+

212

← Male

Female →

Age summary

Group	Count	%
Under 18	4,749	20.3%
18 and over	18,610	79.7%
65 and over	4,051	17.3%
Median age	38.5 years

Race & ethnicity

White 72.3%

Black or African American 16.3%

Two or more races 5.4%

Hispanic or Latino 3.9%

Other race 1%

Asian 0.9%

American Indian / Alaska Native 0.1%

Group	Count	%
White	17,578	72.3%
Black or African American	3,951	16.3%
Two or more races	1,324	5.4%
Hispanic or Latino	940	3.9%
Other race	250	1%
Asian	227	0.9%
American Indian / Alaska Native	17	0.1%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	55.0%	50.0%	45.8%
$50k – $100k	28.9%	28.2%	30.5%
$100k – $200k	14.5%	17.1%	18.6%
Over $200k	1.7%	4.7%	5.1%

Under $10k 7.3%

$10k–$15k 6.9%

$15k–$25k 10.4%

$25k–$35k 13.1%

$35k–$50k 15.7%

$50k–$75k 15.2%

$75k–$100k 12.2%

$100k–$150k 11.6%

$150k–$200k 5.2%

$200k+ 2.3%

Range	% of households
Under $10k	7.3%
$10k–$15k	6.9%
$15k–$25k	10.4%
$25k–$35k	13.1%
$35k–$50k	15.7%
$50k–$75k	15.2%
$75k–$100k	12.2%
$100k–$150k	11.6%
$150k–$200k	5.2%
$200k+	2.3%
Median income	$45,665

Housing

Home values

Under $50k 10.1%

$50k–$100k 11.5%

$100k–$150k 13.6%

$150k–$200k 23.7%

$200k–$300k 22.8%

$300k–$500k 15.0%

$500k–$1M 2.8%

$1M+ 0.4%

Housing overview

Metric	Value
Median home value	$182,900
Median rent / month	$936
Owner occupied	62.4%
Renter occupied	37.6%
Vacant	13.0%
Single-family detached	59.9%
Large apartment buildings	3.3%
Mobile homes	18.3%
Median rooms	5.4
Avg household size (owned)	2.36

Year built

Era	%
2020 or later	0.6%
2010–2019	10.8%
2000–2009	16.0%
1990–1999	17.0%
1980–1989	13.7%
1970–1979	16.1%
1960–1969	10.0%
1950–1959	5.4%
1940–1949	5.7%
1939 or earlier	4.6%

Bedrooms

Size	% of units
No bedroom (studio)	1.9%
1 bedroom	8.2%
2 bedrooms	25.4%
3 bedrooms	46.9%
4 bedrooms	14.7%
5+ bedrooms	2.9%

Vehicles per household

Vehicles	% of households
No vehicle	8.3%
1 vehicle	31.0%
2 vehicles	34.1%
3 or more	26.5%

Heating fuel

Fuel type	%
Utility gas	22.1%
Electricity	72.6%
Propane / LP gas	3.4%
Fuel oil	0.7%
Wood	0.7%
No fuel used	0.5%

Households & families

Household type	Count	%
Married-couple family	3,985	39.4%
Cohabiting couple	452	4.5%
Male householder, no spouse	2,135	21.1%
Female householder, no spouse	3,531	35.0%
Households with children under 18	2,660	26.3%
Households with seniors (65+)	2,840	28.1%
Average household size	2.28

Marital status

Status	Male	Female
Never married	38.0%	34.5%
Married	46.0%	39.3%
Separated	0.6%	3.2%
Widowed	3.8%	9.9%
Divorced	11.6%	13.1%

Education

Less than 9th grade 4.4%

Some HS, no diploma 11.5%

HS graduate 29.4%

Some college, no degree 20.9%

Associate's degree 11.2%

Bachelor's degree 15.6%

Graduate / professional 7.0%

Metric	%
HS diploma or higher	84.1%
Bachelor's or higher	22.6%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	235	4.1%
Kindergarten	352	6.1%
Elementary school	2,217	38.5%
High school	933	16.2%
College / grad school	2,028	35.2%

Employment

Industry of employment

Education & healthcare 24.2%

Manufacturing 18.7%

Retail trade 13.2%

Finance & real estate 9.1%

Arts, food & hospitality 8.3%

Professional & management 7.7%

Construction 6.4%

Transportation & utilities 5.2%

Other services 3.7%

Agriculture & mining 1.6%

Public administration 1.2%

Wholesale trade 0.4%

Information 0.4%

Occupation

Category	%
Management, business & arts	34.4%
Service	15.7%
Sales & office	21.7%
Natural resources & construction	8.0%
Production & transportation	20.2%

Employment type

Type	%
Private sector	79.4%
Government	14.3%
Self-employed	6.0%
Unpaid family workers	0.3%

Commute

Method	%
Drive alone	77.2%
Carpool	12.4%
Public transit	1.0%
Walk	1.4%
Work from home	5.3%
Other means	2.8%
Avg commute (minutes)	22.7

Poverty

All people 20.8%

Under 18 years 26.0%

18 and over 19.5%

Married-couple families 6.7%

Female-led households 29.7%

Income support

Source	% of households
Social Security	33.9%
Retirement income	24.8%
Supplemental Security	3.7%
Cash public assistance	1.6%
Food stamps / SNAP	17.0%

Health indicators

Condition	%
Obesity	37.5%
High blood pressure	37.7%
High cholesterol	34.1%
Diabetes	12.0%
Heart disease	7.3%
Stroke	3.8%
Asthma	10.4%
Arthritis	29.5%
Kidney disease	3.3%
Pulmonary disease	8.5%
Cancer	6.6%

Behavior / access	%
Smoking	20.4%
Binge drinking	16.9%
No physical activity	27.1%
Less than 7 hrs sleep	35.4%
Depression	24.0%
Fair or poor health	17.5%
Poor mental health	16.0%
Poor physical health	12.5%
No health insurance	17.4%
Visited doctor (checkup)	77.6%
Visited dentist	60.8%
Cholesterol screening	87.9%
Teeth loss	17.3%

Veterans & disability

Veterans	Count	%
Civilian veterans	1,338	7.2%

Disability	%
Any disability	18.1%
Under 18	3.1%
18–64 years	17.7%
65 and over	37.7%

Health insurance coverage

Type	%
Private insurance	59.7%
Public insurance	44.4%
No insurance	9.5%
Uninsured under 19	0.6%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	22,027	94.3%
Spanish	191	0.9%
Other Indo-European	142	0.6%
Asian & Pacific Islander	37	0.2%
Other languages	12	0.1%

Place of birth & citizenship

Origin	Count	%
Native born (US)	22,807	97.6%
Born in same state	22,692	97.1%
Born in different state	13,787	59.0%
Foreign born	115	0.5%
Naturalized citizen	552	2.4%
Not a US citizen	315	57.1%

Ancestry

Ancestry	Count	%
French	3,232	13.8%
Italian	2,669	11.4%
Arab	2,299	9.8%
English	194	0.8%

Ancestry	Count	%
Polish	87	0.4%
Dutch	16	0.1%
German	4	0%

Technology access

Metric	% of households
Computer access	43.3%
Internet access	89.3%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions about ZIP code 29678

What city is ZIP code 29678 in?

ZIP code 29678 is primarily assigned to Seneca, South Carolina.

What county is ZIP code 29678 in?

ZIP code 29678 falls within Oconee County, South Carolina.

What is the poverty rate in ZIP code 29678?

21% of residents in ZIP code 29678 live below the poverty line, above the national average.

What is the typical home value in ZIP code 29678?

The median home value in ZIP code 29678 is $182,900.

What is the median household income in ZIP code 29678?

The median household income in ZIP code 29678 is $45,665, below the national median of ~$75,000.

What is the population of ZIP code 29678?

ZIP code 29678 has an estimated population of 23,359 residents, with a density of 293 people per square mile.

What timezone is ZIP code 29678 in?

ZIP code 29678 observes the EST timezone.