PlainZIP

Buffalo, SC · standard

ZIP Code 29321

Union County, South Carolina - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.

2,596
26/sq mi
$34,464
Median income
$60,000
Median home value
17.2%
Bachelor's or higher

The verdict

Buffalo pairs one of the lowest household incomes in the country with among the most affordable home values nationally, in a rural, homeowner-dominated area.

3th pct
household income, US ZIPs
2th pct
home value, US ZIPs
26
people per sq mi
86%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 29321 against every reporting US ZIP.

ZIP code 29321 covers 101.4 square miles in Buffalo, Union County, South Carolina (a standard USPS delivery area), with a modest 2,596 residents on file, a density of 26 people per square mile, in the New York time zone.

ZIP 29321 sits on the lower end of the income spectrum: median household income is $34,464 (46% below the South Carolina average), while per-capita income is $27,016. 33.5% of residents live below the poverty line, and the unemployment rate reads 8.1%. The typical home here is valued at $60,000 (73% below the state average); renters pay a median of $904 monthly, and 86.4% of units are owner-occupied.

Educational attainment sits below the national norm: 17.2% of adults hold a bachelor's degree or higher, the median age is 41.7, and the average commute is -. A geography-based comparison follows: 4 ZIP codes within about 10 miles of 29321, plus 4 more within Union County, give a clearer read than the national average alone.

Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →

Top industries in ZIP 29321

Top 5 sectors by establishment count in Buffalo, SC

Which industries have the most business establishments in ZIP 29321.

establishments

What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.

Source U.S. Census Bureau · ZIP Code Business Patterns (ZBP) As of 2023

Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 29321, Buffalo, SC · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.

Quick Facts

2,596

Population

101.4

Area (sq mi)

26

People / sq mi

New York

Time Zone

standard

ZIP Type

Neighborhood Scorecard
Get an A-F grade across income, safety, housing, rent, education, commute, and childcare for this ZIP code.
View Scorecard →

Who lives in ZIP 29321?

41.7

Median Age

50.6%

Male

49.4%

Female

0.2%

Foreign-Born

White 92.9%
African American 4.0%
Asian 0.0%
American Indian or Alaska Native 0.0%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 3.1%
Hispanic or Latino 0.0%

Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How much do residents earn?

$34,464

Median Household Income

-46% vs state

$27,016

Per Capita Income

33.5%

Poverty Rate

8.1%

Unemployment Rate

How ZIP 29321 ranks nationally

Buffalo, SC household income vs. every US ZIP code

Median household income, the full national distribution, with this ZIP marked

$34,464 3rd percentile higher than 3% of 30,318 US ZIPs

$0–$20,000: 118 US ZIPs (0%). Below this entry. $20,000–$40,000: 1,573 US ZIPs (5%). This entry sits in this band. $40,000–$60,000: 7,092 US ZIPs (23%). Above this entry. $60,000–$80,000: 9,980 US ZIPs (33%). Above this entry. $80,000–$100,000: 5,778 US ZIPs (19%). Above this entry. $100,000–$120,000: 2,855 US ZIPs (9%). Above this entry. $120,000–$140,000: 1,362 US ZIPs (4%). Above this entry. $140,000–$160,000: 686 US ZIPs (2%). Above this entry. $160,000–$180,000: 364 US ZIPs (1%). Above this entry. $180,000–$200,000: 186 US ZIPs (1%). Above this entry. $200,000–$220,000: 324 US ZIPs (1%). Above this entry. This ZIP $0 $200K+ every reporting US ZIP, bucketed by value

Each bar is a $20K-wide band; taller bars hold more US ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What is the education profile here?

High School Graduate or Higher 48.4%
Bachelor's Degree or Higher 17.2%

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What does housing look like?

1,570

Total Housing Units

1,299

Occupied Units

271

Vacant Units

2.49

Avg Household Size

Occupancy Type

Owner 86.4%
Renter 13.6%

$60,000

Median Home Value

-73% vs state

$904

Median Rent

1978

Median Year Built

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What businesses operate in this ZIP?

Census Bureau data shows 22 business establishments in ZIP 29321, employing approximately 143 people with a combined annual payroll of $3,486,000.

22

Businesses

143

Employees

$3.5M

Annual Payroll

3

Industry Sectors

Industry Establishments % of Total
Retail trade 6 27.3%
Other services (except public administration) 6 27.3%
Accommodation and food services 4 18.2%

Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.

Nearby ZIP Codes

Want a side-by-side? Compare 29321 vs 29379 →

ZIP 29321 vs its nearest neighbors, by population

Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.

residents

What this shows Among its immediate neighbors, ZIP 29321 ranks #4 by population - useful context the national average alone can't give.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023

ZIP 29321 vs its nearest neighbors, by median income

Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.

median income

What this shows By household income, ZIP 29321 ranks #4 of 4 neighboring ZIPs, local affluence varies block to block, not just metro to metro.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023
ZIP Code City Population Distance
29379 Union, SC 19,186 8.0 mi
29331 Cross Anchor, SC 142 7.6 mi
29374 Pauline, SC 3,534 7.7 mi
29353 Jonesville, SC 4,174 9.0 mi

More ZIP Codes in Union County

29379 standard
Union, SC
Pop: 19,186
29353 standard
Jonesville, SC
Pop: 4,174
29031 standard
Carlisle, SC
Pop: 1,349
29364 standard
Lockhart, SC
Pop: 592

Related Areas

Union County Buffalo, SC South Carolina

Frequently Asked Questions

What county is ZIP code 29321 in? ▼
ZIP code 29321 (Buffalo) is located in Union County, South Carolina. Union County contains multiple ZIP codes, see the full list at /counties/union-sc.
What is the population of ZIP code 29321? ▼
ZIP code 29321 in Buffalo, SC has a population of 2,596 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 29321? ▼
The median household income in ZIP 29321 is $34,464, which is 55% below the national average of $76,288.
What is the average home value in ZIP 29321? ▼
The median home value in ZIP 29321 is $60,000, which is 78% below the national average of $278,155.
What is the demographic makeup of ZIP 29321? ▼
The largest racial group in ZIP 29321 is White at 92.9%.
How many businesses are in ZIP code 29321? ▼
ZIP code 29321 has 22 business establishments employing approximately 143 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 29321? ▼
The top industries by establishment count in ZIP 29321 are: Retail trade (6), Other services (except public administration) (6), Accommodation and food services (4). There are 3 industry sectors represented in total.
What is the education level in ZIP code 29321? ▼
In ZIP code 29321, 48.4% of residents aged 25+ have a high school diploma or higher, and 17.2% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What percentage of residents own vs. rent in ZIP 29321? ▼
In ZIP code 29321, approximately 86.4% of occupied housing units are owner-occupied and 13.6% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 29321? ▼
The poverty rate in ZIP code 29321 is 33.5% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.

Read our methodology to see how this data is sourced, computed, and verified.