Residential delivery area · Kentucky
ZIP Code 42134: Franklin, KY
ZIP code 42134 uses the postal name Franklin, Kentucky and lies mostly in Simpson County (93% of its land) with the rest in Allen County (Census 2020 ZIP-county file). About 19,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $59,113 (Census Bureau, ACS 2020-2024). By Census place, 7% of its land lies in Franklin; 93% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Franklin · its only residential ZIP
- County
- Simpson County (93%); Allen County (7%)
- Census places
- Franklin
- Micro area
- Franklin, KY
- House district
- KY-1 119th Congress
- State
- Kentucky
- Time zone
- Central
- Land area
- 212.6 sq mi · 91 people per sq mi
- PO Box ZIPs
- 42135 also use the name Franklin
Where is ZIP code 42134?
42134 centers on 36.727°, -86.563° and covers 212.6 square miles of land plus 2.1 of water. It borders 11 ZIP codes: 42170, 37141, 37148, 42104, 42122, 42206, 42202, 42120, 42276, 37186 and more.
The map draws ZIP code areas only. For the streets inside 42134, 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 42134 compare with the rest of Simpson County?
| Measure | 42134 | In Simpson County | In KY |
|---|---|---|---|
| People (ACS 2020-2024) | 19,380 | 2nd of 5 | 80th of 780 |
| Median household income | $59k | 4th of 4 | 183rd of 310 |
| Median home value | $227k | 2nd of 4 | 73rd of 320 |
Its median household income is higher than in 28% of U.S. residential ZIP codes, and it is denser than 52% 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 42134?
The 2020 Census counted 18,881 people in 42134; the ACS, which samples households over 2020-2024, estimates 19,380. Between the 2010 and 2020 censuses its population grew 12.5% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 19,380
- 2020 Census count
- 18,881+12.5% since 2010 (16,785)
- Households
- 7,674
- Median age
- 38.7
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 42134?
Of the 19,380 people the ACS estimates in 42134, 24.0% are under 18 and 16.7% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (84.5%).
- Under 1824.0%
- 18 to 6459.3%
- 65 and older16.7%
- White, not Hispanic84.5%
- Black, not Hispanic6.9%
- Other or two or more4.8%
- Hispanic or Latino3.7%
- Asian, not Hispanic0.2%
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 42134 earn?
Median household income is $59,113 (ACS 2020-2024), the 4th highest of the 4 ranked ZIP codes in Simpson County. It is not measurably different from 2015-2019 ($60,563 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $59,113
- Income per person
- $30,926
- Below the poverty line
- 15.8%
- Unemployed (of the labor force)
- 3.4%
- Adults 25+ with a bachelor's degree
- 18.9%
- Adjusted gross income per tax return, 2022
- $58,4308,090 returns; wages 73% 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 42134?
FHFA's house price index for 42134, built from repeat sales and appraisals of the same homes, rose 98% from 2015 to 2025 and rose 59% from 2020 to 2025, and moved +4.8% in 2025.
- Median home value (owners' estimate)
- $226,800
- Median gross rent
- $1,002
- Homes owned by their occupants
- 65.3%
- Housing units
- 8,326
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 42134?
389 business establishments had a location in this ZIP code in 2023, 41 more than in 2018; the most are in retail trade (ZIP Code Business Patterns).
- Retail trade70
- Accommodation and food services57
- Construction42
- Other services (except public administration)39
- Health care and social assistance36
- Manufacturing32
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 42134?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 42170 | Woodburn | 1,938 | $96k | 9.0 mi |
| 37141 | Orlinda, TN | 1,618 | $76k | 10.8 mi |
| 37148 | Portland, TN | 26,274 | $82k | 11.0 mi |
| 42104 | Bowling Green | 42,076 | $75k | 12.1 mi |
| 42122 | Alvaton | 5,513 | $114k | 14.7 mi |
| 42206 | Auburn | 5,897 | $67k | 14.9 mi |
| 42202 | Adairville | 1,958 | $63k | 15.9 mi |
| 42120 | Adolphus | 2,745 | $65k | 15.9 mi |
| 42276 | Russellville | 16,044 | $57k | 19.9 mi |
| 37186 | Westmoreland, TN | 10,709 | $60k | 20.9 mi |
| 42164 | Scottsville | 17,673 | $60k | 21.4 mi |
| 37049 | Cross Plains, TN | 4,160 | $90k | 13.2 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.
Which other ZIP codes use the name Franklin?
1 more ZIP code carries the postal name Franklin, KY without a residential delivery area: PO boxes at the post office, or a single organization with its own ZIP code. The Census Bureau publishes no figures for it.
| ZIP | County |
|---|---|
| 42135 | Simpson County |
Source: GeoNames postal codes (CC BY 4.0), downloaded 2026-10-09; a ZIP code with no Census ZCTA has no residential delivery area.