28731 ZIP Code, Flat Rock, NC
28731 is a ZIP code in Flat Rock, North Carolina — mostly in Henderson County (81% of its land), with smaller parts in Polk County. It covers 33 square miles of land. The closest ZIP codes are 28726, 28773 and 28792. 8,672 people live here in 3,783 households. With about 262 people per square mile it is lightly settled, and most homes are owner-occupied (86%). Median household income is $66,309, close to the North Carolina median of $72,388; the median age is 54.9, older than most ZIP codes.
Quick facts
- Mailing city: Flat Rock, NC
- County: Henderson County
- Land area: 33 sq mi
- Population: 8,672
- Median household income: $66,309
- Carrier routes: 7 (5,015 homes)
Key figures
| Measure | Value |
|---|---|
| Residents | 8,672 |
| Households | 3,783 |
| Median household income | $66,309 |
| Income per person | $46,206 |
| Median age | 54.9 |
| Homeowners | 85.6% |
| Median home value | $402,300 |
| Median rent | $1,005 |
| Bachelor's degree or higher | 41.1% |
| Average commute (minutes) | 22 |
| Households with kids under 18 | 17.4% |
| Moved in the past year | 16.9% |
| Below the poverty line | 14.0% |
| Broadband internet | 94.4% |
| Speak a non-English language at home | 8.8% |
Household income
| % of households | Value |
|---|---|
| <$10K | 2.6% |
| $10–15K | 2.1% |
| $15–25K | 8.6% |
| $25–35K | 12.8% |
| $35–50K | 11.1% |
| $50–75K | 16.2% |
| $75–100K | 11.4% |
| $100–150K | 16.9% |
| $150–200K | 11.1% |
| $200K+ | 7.2% |
Age
| % of all residents | Value |
|---|---|
| <10 | 8.6% |
| 10–19 | 7.5% |
| 20–24 | 2.4% |
| 25–34 | 10.8% |
| 35–44 | 10.0% |
| 45–54 | 11.1% |
| 55–64 | 15.2% |
| 65–74 | 19.6% |
| 75+ | 14.7% |
Tenure
| % of housing units | Value |
|---|---|
| Owned, with mortgage | 33.2% |
| Owned outright | 39.4% |
| Rented | 11.8% |
| Vacant | 15.5% |
Type of building
| % of housing units | Value |
|---|---|
| Detached house | 71.5% |
| Townhome | 5.5% |
| 2–4 units | 1.2% |
| 5–19 units | 0.9% |
| 20+ units | 0.2% |
| Mobile / other | 20.7% |
Businesses in 28731
205 business establishments with 2,577 employees (ZIP Codes Business Patterns 2023).
- Construction: 38
- Other Services (except Public Administration): 26
- Wholesale Trade: 23
- Accommodation and Food Services: 23
- Retail Trade: 18
- Administrative and Support and Waste Management and Remediation Services: 16
- Health Care and Social Assistance: 16
- Professional, Scientific, and Technical Services: 13
EDDM carrier routes
28731 has 7 USPS carrier routes with 5,015 residential and 202 business mailboxes. Open the EDDM route map.
Carrier routes in 28731
28731 has 7 USPS carrier routes (7 rural (R)) with 5,015 residential and 202 business mailboxes. Routes range from 361 homes (R007) to 1,052 homes (R002); the median route has 733 homes. The Census counted 3,783 households in 28731 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.
| Homes per route | Routes |
|---|---|
| 1–249 | 0 |
| 250–499 | 1 |
| 500–749 | 3 |
| 750–999 | 2 |
| 1,000–1,499 | 1 |
| 1,500+ | 0 |
Best routes in 28731 for…
Most businesses
For B2B offers: office supplies, cleaning, IT, catering and commercial services.
- Route R006 — USPS business mailboxes 100, 901 homes
- Route R007 — USPS business mailboxes 32, 361 homes
- Route R001 — USPS business mailboxes 22, 786 homes
- Route R004 — USPS business mailboxes 19, 733 homes
- Route R002 — USPS business mailboxes 15, 1,052 homes
Select these 5 routes on the route map
Every carrier route in 28731
| Route | Type | Homes | Businesses | Est. median income | Est. owners | Est. families with kids | Est. moved in past year |
|---|---|---|---|---|---|---|---|
| R001 | Rural | 786 | 22 | $41,479 | — | — | — |
| R002 | Rural | 1,052 | 15 | $58,555 | — | — | — |
| R003 | Rural | 663 | 7 | $117,904 | — | — | — |
| R004 | Rural | 733 | 19 | $100,382 | — | — | — |
| R005 | Rural | 519 | 7 | $84,772 | — | — | — |
| R006 | Rural | 901 | 100 | $34,961 | — | — | — |
| R007 | Rural | 361 | 32 | $74,495 | — | — | — |
Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 28731 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
- 28726 — East Flat Rock CDP, NC (2.2 mi)
- 28773 — Saluda city, NC (5.2 mi)
- 28792 — Edneyville CDP, NC (7 mi)
- 28791 — Mountain Home CDP, NC (8.4 mi)
- 28739 — Etowah CDP, NC (8.5 mi)
- 28758 — Mountain Home CDP, NC (8.6 mi)
- 28790 — East Flat Rock CDP, NC (9.2 mi)
- 28756 — Columbus town, NC (10.6 mi)
Areas that include 28731
- East Flat Rock, NC ZIP codes — 3 ZIP codes
- Dana, NC ZIP codes — 2 ZIP codes
- Flat Rock, NC ZIP codes — 2 ZIP codes
- Henderson County ZIP codes — 15 ZIP codes
- Polk County ZIP codes — 6 ZIP codes
- North Carolina ZIP code data
Where it ranks
- No. 5 of 12: highest median home value in Henderson County
- No. 4 of 12: highest share of owner-occupied homes in Henderson County
- No. 1 of 12: highest share of residents who moved in during the past year in Henderson County
- No. 3 of 12: highest median age in Henderson County
Mail every home in 28731
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) 28731, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.
Frequently asked questions
- What city is 28731 in?
- 28731 is a Flat Rock, NC mailing address. By land area, 15% lies inside Flat Rock, 15% lies inside Dana and 4% lies inside East Flat Rock; the rest is outside any Census-defined city or community.
- What county is 28731 in?
- 28731 is mostly in Henderson County (81% of its land), with smaller parts in Polk County.
- What is the population of 28731?
- About 8,672 people (±1,026), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 8,806.
- What is the median household income in 28731?
- $66,309 (±$11,804), compared with $72,388 for North 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 28731?
- 7 USPS carrier routes with 5,015 residential and 202 business mailboxes (5,217 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
- What ZIP codes are near 28731?
- The closest, measured center to center: 28726 (2.2 mi, East Flat Rock), 28773 (5.2 mi, Saluda), 28792 (7 mi, Edneyville), 28791 (8.4 mi, Mountain Home), 28739 (8.5 mi, Etowah) and 28758 (8.6 mi, Mountain Home).
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.