Residential delivery area · North Carolina
ZIP Code 28756: Mill Spring, NC
ZIP code 28756 uses the postal name Mill Spring, North Carolina and lies mostly in Polk County (99% of its land) with the rest in Rutherford County (Census 2020 ZIP-county file). About 4,700 people live there (Census Bureau, ACS 2020-2024). Median household income is $63,663 (Census Bureau, ACS 2020-2024). Its land lies mostly outside any Census place; under 1% is in small places.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Mill Spring · its only residential ZIP
- County
- Polk County (99%); Rutherford County (1%)
- House districts
- NC-11 (90%), NC-14 (10%) 119th Congress, by share of land
- State
- North Carolina
- Time zone
- Eastern
- Land area
- 79.3 sq mi · 59 people per sq mi
Where is ZIP code 28756?
28756 centers on 35.356°, -82.209° and covers 79.3 square miles of land plus 0.6 of water. It borders 8 ZIP codes: 28720, 28773, 28746, 28782, 28792, 28731, 28139, 28722.
The map draws ZIP code areas only. For the streets inside 28756, 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).
How does 28756 compare with the rest of Polk County?
| Measure | 28756 | In Polk County | In NC |
|---|---|---|---|
| People (ACS 2020-2024) | 4,706 | 5th of 6 | 448th of 853 |
| Median household income | $64k | 4th of 5 | 300th of 528 |
| Median home value | $278k | not ranked | not ranked |
28756's median home value is not ranked: its 90% margin of error (±$81,695) is more than a quarter of the figure ($277,600). Rankings use ZIP codes of 1,000 or more people living in households, with margins at most 25% of the figure.
Its median household income is higher than in 36% of U.S. residential ZIP codes, and it is denser than 45% 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 28756?
The 2020 Census counted 4,156 people in 28756; the ACS, which samples households over 2020-2024, estimates 4,706. Its boundary changed between the 2010 and 2020 censuses, so the two counts are not compared.
- People, ACS 2020-2024
- 4,706±521 (90% margin)
- 2020 Census count
- 4,156
- Households
- 1,834
- 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 28756?
Of the 4,706 people the ACS estimates in 28756, 25.2% are under 18 and 18.8% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (73.6%), then Hispanic or Latino (16.1%).
- Under 1825.2%
- 18 to 6456.0%
- 65 and older18.8%
- White, not Hispanic73.6%
- Hispanic or Latino16.1%
- Black, not Hispanic7.2%
- Other or two or more2.5%
- Asian, not Hispanic0.5%
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 28756 earn?
Median household income is $63,663 (ACS 2020-2024), the 4th highest of the 5 ranked ZIP codes in Polk County.
- Median household income
- $63,663±$8,036
- Income per person
- $35,547
- Below the poverty line
- 18.1%
- Unemployed (of the labor force)
- 6.7%
- Adults 25+ with a bachelor's degree
- 19.4%
- Adjusted gross income per tax return, 2022
- $91,1571,890 returns; wages 53% 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 28756?
FHFA's house price index for 28756, built from repeat sales and appraisals of the same homes, rose 107% from 2015 to 2025 and rose 71% from 2020 to 2025.
- Median home value (owners' estimate)
- $277,600
- Median gross rent
- $644
- Homes owned by their occupants
- 75.1%
- Housing units
- 2,444
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 28756?
66 business establishments had a location in this ZIP code in 2023, 2 fewer than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction15
- Other services (except public administration)8
- Agriculture, forestry, fishing and hunting7
- Administrative and support and waste management and remediation services7
- Health care and social assistance7
- Manufacturing5
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 28756?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 28720 | Chimney Rock | 138 | $63k | 7.0 mi |
| 28773 | Saluda | 3,441 | $71k | 8.3 mi |
| 28746 | Lake Lure | 2,744 | $71k | 8.8 mi |
| 28782 | Tryon | 6,519 | $73k | 9.1 mi |
| 28792 | Hendersonville | 36,645 | $56k | 9.4 mi |
| 28731 | Flat Rock | 8,672 | $66k | 10.6 mi |
| 28139 | Rutherfordton | 20,008 | $57k | 12.1 mi |
| 28722 | Columbus | 6,086 | $68k | 13.2 mi |
| 28710 | Bat Cave | 78 | – | 8.0 mi (near) |
| 28735 | Gerton | 124 | – | 11.4 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.