Residential delivery area · Kentucky
ZIP Code 42503: Somerset, KY
ZIP code 42503 uses the postal name Somerset, Kentucky and lies entirely in Pulaski County (Census 2020 ZIP-county file). About 25,000 people live there (Census Bureau, ACS 2020-2024), the more populous of Somerset's 2 residential ZIP codes. Median household income is $54,707 (Census Bureau, ACS 2020-2024). Its land lies mostly outside any Census place; 6% is in small places.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Somerset · 2 residential ZIPs
- County
- Pulaski County
- Micro area
- Somerset, KY
- House district
- KY-5 119th Congress
- State
- Kentucky
- Time zone
- Eastern
- Land area
- 129.4 sq mi · 196 people per sq mi
- PO Box ZIPs
- 42502 also use the name Somerset
Where is ZIP code 42503?
42503 centers on 37.158°, -84.520° and covers 129.4 square miles of land plus 4.0 of water. It borders 9 ZIP codes: 42501, 42567, 42553, 42519, 40409, 40456, 42544, 42518, 42633.
The map draws ZIP code areas only. For the streets inside 42503, 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 42503 compare with the rest of Somerset?
| Measure | 42503 | In Somerset | In Pulaski County | In KY |
|---|---|---|---|---|
| People (ACS 2020-2024) | 25,321 | 1st of 2 | 1st of 11 | 53rd of 780 |
| Median household income | $55k | 1st of 2 | 3rd of 9 | 216th of 310 |
| Median home value | $210k | 1st of 2 | 1st of 7 | 96th of 320 |
Its median household income is higher than in 21% of U.S. residential ZIP codes, and it is denser than 62% 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 42503?
The 2020 Census counted 24,670 people in 42503; the ACS, which samples households over 2020-2024, estimates 25,321. Between the 2010 and 2020 censuses its population grew 7.8% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 25,321
- 2020 Census count
- 24,670+7.8% since 2010 (22,894)
- Households
- 10,272
- Median age
- 42.3
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 42503?
Of the 25,321 people the ACS estimates in 42503, 22.1% are under 18 and 20.6% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (94.5%).
- Under 1822.1%
- 18 to 6457.2%
- 65 and older20.6%
- White, not Hispanic94.5%
- Hispanic or Latino2.9%
- Other or two or more1.1%
- Asian, not Hispanic1.0%
- Black, not Hispanic0.6%
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 42503 earn?
Median household income is $54,707 (ACS 2020-2024), the 3rd highest of the 9 ranked ZIP codes in Pulaski County. It is not measurably different from 2015-2019 ($61,207 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $54,707±$6,375
- Income per person
- $32,285
- Below the poverty line
- 15.2%
- Unemployed (of the labor force)
- 5.0%
- Adults 25+ with a bachelor's degree
- 23.4%
- Adjusted gross income per tax return, 2022
- $74,33410,390 returns; wages 59% 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 42503?
FHFA's house price index for 42503, built from repeat sales and appraisals of the same homes, rose 72% from 2015 to 2025 and rose 46% from 2020 to 2025, and moved −3.6% in 2025.
- Median home value (owners' estimate)
- $210,200
- Median gross rent
- $838
- Homes owned by their occupants
- 71.6%
- Housing units
- 11,589
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 42503?
496 business establishments had a location in this ZIP code in 2023, 52 more than in 2018; the most are in health care and social assistance (ZIP Code Business Patterns).
- Health care and social assistance146
- Retail trade74
- Construction44
- Other services (except public administration)37
- Wholesale trade30
- Professional, scientific, and technical services29
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 42503?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 42501 | Somerset | 18,214 | $49k | 8.0 mi |
| 42567 | Eubank | 5,390 | $47k | 8.8 mi |
| 42553 | Science Hill | 5,649 | $53k | 9.9 mi |
| 42519 | Burnside | 2,756 | $42k | 14.0 mi |
| 40409 | Brodhead | 3,445 | $53k | 15.3 mi |
| 40456 | Mount Vernon | 8,370 | $47k | 17.4 mi |
| 42544 | Nancy | 5,520 | $61k | 18.5 mi |
| 42518 | Bronston | 3,031 | $54k | 18.6 mi |
| 42633 | Monticello | 18,606 | $46k | 29.9 mi |
| 42533 | Ferguson | 897 | $41k | 7.2 mi (near) |
| 42516 | Bethelridge | 540 | $43k | 15.2 mi (near) |
| 40489 | Waynesburg | 4,538 | $56k | 15.7 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.