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Kentucky ZIP Codes
Clinton County
Alpha, KY
42603
42603 ZIP Code — Alpha, KY
Clinton County, Kentucky
ZIP code 42603 is located in
Alpha ,
Kentucky ,
within Clinton County .
It covers approximately 11.39 square miles and serves a population of
628 residents.
This is a standard ZIP code in the Central (CT) timezone,
served by area code 606 .
About ZIP code 42603
The housing stock consists of a higher-than-average concentration of mobile homes. Much of the housing stock is relatively new, reflecting recent development activity. Median home value is $75,000. Owner-occupancy is high at 88%, well above the national average.
The gap between median ($50,893) and mean household income suggests income inequality — a small number of higher earners pull the average up.
The dominant occupation class is production, transportation, and material moving, with manufacturing as the leading industry. The average commute of 27 minutes is near the national average.
College attainment at 3% is below the national average, consistent with a trades and production-oriented local economy.
Health indicators show elevated rates of diabetes (16%), smoking (29%) compared to national benchmarks.
Overall, ZIP code 42603 reflects a community defined by a trades-oriented workforce and high homeownership.
42603 ZIP code map
View map of 42603
Cities in ZIP code 42603
Below are the cities the US Postal Service accepts for ZIP code 42603. Using any city not on this list may result in mail delivery delays.
City
Status
Alpha
Preferred
Nearby ZIP codes
Demographics
updated 06/2026
Population
Total population
628
Population density
55 / sq mi
State FIPS
21
County FIPS
053
Geography
Land area
11.39 sq mi
Water area
0.07 sq mi
Latitude
36.7846
Longitude
-84.9933
Timezone
Central (CT)
Area code
606
Economics
updated 06/2026
Household income
Income range
This ZIP
County avg
State avg
Under $50k
100.0%
68.4%
47.9%
$50k – $100k
0.0%
20.4%
30.3%
$100k – $200k
0.0%
9.5%
17.6%
Over $200k
0.0%
1.8%
4.2%
Demographics & statistics
$50,893
Median household income
Age distribution
Age summary
Group Count % Under 18 150 23.9% 18 and over 478 76.1% 65 and over 58 9.2% Median age 39.0 years
Race & ethnicity
Group Count % White 622 99% Two or more races 6 1%
Household income
Income range
This ZIP
County avg
State avg
Under $50k
100.0%
68.4%
47.9%
$50k – $100k
0.0%
20.4%
30.3%
$100k – $200k
0.0%
9.5%
17.6%
Over $200k
0.0%
1.8%
4.2%
Range % of households $10k–$15k 23.5% $15k–$25k 6.8% $25k–$35k 7.3% $35k–$50k 8.1% $50k–$75k 18.8% $75k–$100k 22.6% $100k–$150k 10.3% $200k+ 2.6% Median income $50,893
Housing
Housing overview
Metric Value Median home value $75,000 Median rent / month $516 Owner occupied 87.6% Renter occupied 12.4% Vacant 12.7% Single-family detached 57.8% Large apartment buildings 0.0% Mobile homes 42.2% Median rooms 5.6 Avg household size (owned) 2.56
Year built
Era % 2020 or later 0.0% 2010–2019 23.9% 2000–2009 21.6% 1990–1999 14.6% 1980–1989 10.4% 1970–1979 6.7% 1960–1969 14.6% 1950–1959 6.0% 1940–1949 0.0% 1939 or earlier 2.2%
Bedrooms
Size % of units No bedroom (studio) 0.0% 1 bedroom 5.6% 2 bedrooms 12.3% 3 bedrooms 47.0% 4 bedrooms 28.0% 5+ bedrooms 7.1%
Vehicles per household
Vehicles % of households No vehicle 0.0% 1 vehicle 35.0% 2 vehicles 29.5% 3 or more 35.5%
Heating fuel
Fuel type % Utility gas 4.7% Electricity 76.9% Propane / LP gas 18.4%
Households & families
Household type Count % Married-couple family 117 50.0% Cohabiting couple 21 9.0% Male householder, no spouse 28 12.0% Female householder, no spouse 68 29.1% Households with children under 18 110 47.0% Households with seniors (65+) 35 15.0% Average household size 2.67
Marital status
Status Male Female Never married 16.6% 37.0% Married 52.6% 33.4% Separated 0.0% 0.0% Widowed 7.6% 5.8% Divorced 23.2% 23.7%
Education
Some HS, no diploma
22.7%
Some college, no degree
18.4%
Graduate / professional
0.0%
Metric % HS diploma or higher 69.4% Bachelor's or higher 3.1%
School enrollment (ages 3–17)
Type Count % Nursery / preschool 0 0.0% Kindergarten 16 9.9% Elementary school 65 40.1% High school 81 50.0% College / grad school 0 0.0%
Employment
Industry of employment
Education & healthcare
17.5%
Agriculture & mining
10.2%
Transportation & utilities
4.4%
Arts, food & hospitality
2.2%
Professional & management
1.1%
Occupation
Category % Management, business & arts 7.6% Service 14.9% Sales & office 12.7% Natural resources & construction 27.3% Production & transportation 37.5%
Employment type
Type % Private sector 76.7% Government 8.4% Self-employed 14.9% Unpaid family workers 0.0%
Commute
Method % Drive alone 94.5% Carpool 0.0% Public transit 0.0% Walk 5.5% Work from home 0.0% Other means 0.0% Avg commute (minutes) 26.7
Poverty
Married-couple families
0.0%
Female-led households
50.0%
Income support
Source % of households Social Security 25.2% Retirement income 7.3% Supplemental Security 20.1% Cash public assistance 12.0% Food stamps / SNAP 16.7%
Health indicators
Condition % Obesity 41.1% High blood pressure 49.4% High cholesterol 42.4% Diabetes 15.8% Heart disease 10.3% Stroke 4.7% Asthma 11.8% Arthritis 38.9% Kidney disease 4.0% Pulmonary disease 15.0% Cancer 7.5%
Behavior / access % Smoking 29.0% Binge drinking 13.3% No physical activity 37.3% Less than 7 hrs sleep 38.0% Depression 26.6% Fair or poor health 27.0% Poor mental health 18.5% Poor physical health 18.1% No health insurance 11.6% Visited doctor (checkup) 76.7% Visited dentist 47.9% Cholesterol screening 91.0% Teeth loss 23.9%
Veterans & disability
Veterans Count % Civilian veterans 0 0.0%
Disability % Any disability 17.1% Under 18 0.0% 18–64 years 16.0% 65 and over 69.0%
Health insurance coverage
Type % Private insurance 42.8% Public insurance 50.5% No insurance 7.5% Uninsured under 19 0.0%
Language & origin
Language spoken at home (age 5+)
Language Count % English only 609 97.0% Spanish 0 0.0% Other Indo-European 0 0.0% Asian & Pacific Islander 0 0.0% Other languages 0 0.0%
Place of birth & citizenship
Origin Count % Native born (US) 628 100.0% Born in same state 628 100.0% Born in different state 514 81.8% Foreign born 0 0.0% Naturalized citizen 0 0.0% Not a US citizen 0 0.0%
Ancestry
Ancestry Count % Arab 119 18.9% French 32 5.1%
Ancestry Count % Italian 6 1%
Technology access
Metric % of households Computer access 37.3% Internet access 82.9%
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 42603
What city is ZIP code 42603 in?
ZIP code 42603 is primarily assigned to Alpha, Kentucky.
What county is ZIP code 42603 in?
ZIP code 42603 falls within Clinton County, Kentucky.
How educated is the population of ZIP code 42603?
3% of residents hold a bachelor's degree or higher — below the national average of ~33%, consistent with a trades-oriented local economy.
Is ZIP code 42603 mostly owner-occupied?
88% of occupied units in ZIP code 42603 are owner-occupied, well above the national average.
What is the poverty rate in ZIP code 42603?
17% of residents in ZIP code 42603 live below the poverty line, above the national average.
What is the typical home value in ZIP code 42603?
The median home value in ZIP code 42603 is $75,000.
What timezone is ZIP code 42603 in?
ZIP code 42603 observes the CST timezone.
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