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North Carolina ZIP Codes
Polk County
Mill Spring, NC
28756
28756 ZIP Code — Mill Spring, NC
Polk County, North Carolina
ZIP code 28756 is located in
Mill Spring ,
North Carolina ,
within Polk County .
It covers approximately 79.32 square miles and serves a population of
4,244 residents.
This is a standard ZIP code in the Eastern (ET) timezone,
served by area code 828 .
About ZIP code 28756
The housing stock consists of predominantly single-family detached homes. Most homes were built in the 2000s, giving the area an established character. Median home value is $222,500. Owner-occupancy is high at 80%, well above the national average.
Median household income is $60,049. 51% of households receive Social Security income, suggesting a notable retiree or disability population.
The dominant occupation class is service, with education and healthcare as the leading industry. The average commute of 33 minutes is near the national average.
College attainment at 15% is below the national average, consistent with a trades and production-oriented local economy.
Health indicators show elevated rates of smoking (20%) compared to national benchmarks.
Overall, ZIP code 28756 reflects a community defined by a trades-oriented workforce, high homeownership, and a significant Social Security-dependent population.
28756 ZIP code map
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Cities in ZIP code 28756
Below are the cities the US Postal Service accepts for ZIP code 28756. Using any city not on this list may result in mail delivery delays.
Nearby ZIP codes
Demographics
updated 06/2026
Population
Total population
4,244
Population density
54 / sq mi
State FIPS
37
County FIPS
149
Geography
Land area
79.32 sq mi
Water area
0.63 sq mi
Latitude
35.3359
Longitude
-82.1642
Timezone
Eastern (ET)
Area code
828
Economics
updated 06/2026
Household income
Income range
This ZIP
County avg
State avg
Under $50k
50.1%
47.8%
44.4%
$50k – $100k
32.5%
31.7%
30.6%
$100k – $200k
13.6%
16.3%
19.1%
Over $200k
3.8%
4.2%
6.0%
Demographics & statistics
$60,049
Median household income
$222,500
Median home value
15.3%
Bachelor's or higher
Age distribution
Age summary
Group Count % Under 18 1,018 24.0% 18 and over 3,226 76.0% 65 and over 900 21.2% Median age 46.2 years
Race & ethnicity
Black or African American
5.3%
American Indian / Alaska Native
0.2%
Group Count % White 3,392 71.4% Hispanic or Latino 507 10.7% Two or more races 359 7.6% Black or African American 252 5.3% Other race 233 4.9% American Indian / Alaska Native 8 0.2%
Household income
Income range
This ZIP
County avg
State avg
Under $50k
50.1%
47.8%
44.4%
$50k – $100k
32.5%
31.7%
30.6%
$100k – $200k
13.6%
16.3%
19.1%
Over $200k
3.8%
4.2%
6.0%
Range % of households Under $10k 0.9% $10k–$15k 4.9% $15k–$25k 7.5% $25k–$35k 12.0% $35k–$50k 13.7% $50k–$75k 27.8% $75k–$100k 17.7% $100k–$150k 9.6% $150k–$200k 2.1% $200k+ 3.6% Median income $60,049
Housing
Housing overview
Metric Value Median home value $222,500 Median rent / month $600 Owner occupied 79.9% Renter occupied 20.1% Vacant 27.0% Single-family detached 70.7% Large apartment buildings 0.6% Mobile homes 27.2% Median rooms 5.7 Avg household size (owned) 2.67
Year built
Era % 2020 or later 1.2% 2010–2019 5.4% 2000–2009 21.2% 1990–1999 20.4% 1980–1989 13.5% 1970–1979 14.6% 1960–1969 7.0% 1950–1959 5.7% 1940–1949 2.2% 1939 or earlier 8.7%
Bedrooms
Size % of units No bedroom (studio) 1.5% 1 bedroom 6.5% 2 bedrooms 34.9% 3 bedrooms 46.6% 4 bedrooms 9.2% 5+ bedrooms 1.3%
Vehicles per household
Vehicles % of households No vehicle 1.8% 1 vehicle 28.1% 2 vehicles 26.3% 3 or more 43.8%
Heating fuel
Fuel type % Utility gas 9.7% Electricity 57.6% Propane / LP gas 13.3% Fuel oil 3.8% Wood 15.4% No fuel used 0.3%
Households & families
Household type Count % Married-couple family 898 56.3% Cohabiting couple 71 4.4% Male householder, no spouse 180 11.3% Female householder, no spouse 447 28.0% Households with children under 18 501 31.4% Households with seniors (65+) 693 43.4% Average household size 2.64
Marital status
Status Male Female Never married 32.3% 25.6% Married 57.5% 50.7% Separated 0.0% 0.7% Widowed 4.6% 10.4% Divorced 5.7% 12.6%
Education
Some college, no degree
20.2%
Graduate / professional
6.4%
Metric % HS diploma or higher 89.8% Bachelor's or higher 15.3%
School enrollment (ages 3–17)
Type Count % Nursery / preschool 57 7.1% Kindergarten 38 4.7% Elementary school 399 49.4% High school 265 32.8% College / grad school 48 5.9%
Employment
Industry of employment
Education & healthcare
26.2%
Finance & real estate
11.0%
Professional & management
9.3%
Arts, food & hospitality
8.5%
Transportation & utilities
2.3%
Agriculture & mining
1.4%
Public administration
1.1%
Occupation
Category % Management, business & arts 21.0% Service 27.0% Sales & office 26.4% Natural resources & construction 16.4% Production & transportation 9.2%
Employment type
Type % Private sector 79.6% Government 8.2% Self-employed 12.2% Unpaid family workers 0.0%
Commute
Method % Drive alone 84.5% Carpool 10.9% Public transit 0.0% Walk 0.0% Work from home 4.5% Other means 0.2% Avg commute (minutes) 32.9
Poverty
Married-couple families
1.9%
Female-led households
30.2%
Income support
Source % of households Social Security 51.0% Retirement income 30.1% Supplemental Security 2.6% Cash public assistance 6.7% Food stamps / SNAP 12.5%
Health indicators
Condition % Obesity 35.7% High blood pressure 35.8% High cholesterol 36.2% Diabetes 11.2% Heart disease 7.3% Stroke 3.4% Asthma 9.3% Arthritis 27.8% Kidney disease 3.2% Pulmonary disease 8.2% Cancer 6.8%
Behavior / access % Smoking 20.4% Binge drinking 15.9% No physical activity 23.8% Less than 7 hrs sleep 33.7% Depression 24.4% Fair or poor health 15.0% Poor mental health 14.9% Poor physical health 11.9% No health insurance 17.0% Visited doctor (checkup) 77.7% Visited dentist 63.0% Cholesterol screening 89.8% Teeth loss 14.1%
Veterans & disability
Veterans Count % Civilian veterans 243 7.5%
Disability % Any disability 17.5% Under 18 7.6% 18–64 years 15.7% 65 and over 33.4%
Health insurance coverage
Type % Private insurance 54.2% Public insurance 47.5% No insurance 10.9% Uninsured under 19 7.2%
Language & origin
Language spoken at home (age 5+)
Language Count % English only 3,953 93.1% Spanish 109 2.8% Other Indo-European 80 2.0% Asian & Pacific Islander 29 0.7% Other languages 0 0.0%
Place of birth & citizenship
Origin Count % Native born (US) 4,029 94.9% Born in same state 4,029 94.9% Born in different state 2,085 49.1% Foreign born 0 0.0% Naturalized citizen 215 5.1% Not a US citizen 177 82.3%
Ancestry
Ancestry Count % Italian 846 19.9% Arab 565 13.3% French 448 10.6%
Ancestry Count % English 13 0.3% Polish 9 0.2% German 7 0.2%
Technology access
Metric % of households Computer access 37.6% Internet access 91.7%
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 28756
What city is ZIP code 28756 in?
ZIP code 28756 is primarily assigned to Mill Spring, North Carolina.
What county is ZIP code 28756 in?
ZIP code 28756 falls within Polk County, North Carolina.
Does ZIP code 28756 have a large retiree population?
51% of households in ZIP code 28756 receive Social Security income, suggesting a significant retiree or disability population.
What is the population of ZIP code 28756?
ZIP code 28756 has an estimated population of 4,244 residents, with a density of 54 people per square mile.
What is the median household income in ZIP code 28756?
The median household income in ZIP code 28756 is $60,049, below the national median of ~$75,000.
What is the typical home value in ZIP code 28756?
The median home value in ZIP code 28756 is $222,500.
What timezone is ZIP code 28756 in?
ZIP code 28756 observes the EST timezone.
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