Residential delivery area · Kentucky
ZIP Code 42171: Smiths Grove, KY
ZIP code 42171 uses the postal name Smiths Grove, Kentucky and lies mostly in Warren County (48% of its land), reaching into Edmonson County and Barren County (Census 2020 ZIP-county file). About 6,700 people live there (Census Bureau, ACS 2020-2024). Median household income is $70,191 (Census Bureau, ACS 2020-2024). By Census place, under 1% of its land lies in Smiths Grove; more than 99% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Smiths Grove · its only residential ZIP
- County
- Warren County (48%); Edmonson County (28%); Barren County (25%)
- Census places
- Smiths Grove
- Metro area
- Bowling Green, KY
- House district
- KY-2 119th Congress
- State
- Kentucky
- Time zone
- Central
- Land area
- 103.2 sq mi · 65 people per sq mi
Where is ZIP code 42171?
42171 centers on 37.036°, -86.174° and covers 103.2 square miles of land plus 0.6 of water. It borders 8 ZIP codes: 42163, 42159, 42160, 42259, 42210, 42101, 42141, 42164.
The map draws ZIP code areas only. For the streets inside 42171, 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 42171 compare with the rest of Warren County?
| Measure | 42171 | In Warren County | In KY |
|---|---|---|---|
| People (ACS 2020-2024) | 6,723 | 4th of 9 | 171st of 780 |
| Median household income | $70k | 5th of 7 | 98th of 310 |
| Median home value | $188k | 6th of 7 | 127th of 320 |
Its median household income is higher than in 47% of U.S. residential ZIP codes, and it is denser than 47% 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 42171?
The 2020 Census counted 7,552 people in 42171; the ACS, which samples households over 2020-2024, estimates 6,723. Between the 2010 and 2020 censuses its population grew 10.4% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 6,723±777 (90% margin)
- 2020 Census count
- 7,552+10.4% since 2010 (6,841)
- Households
- 2,631
- Median age
- 41.3
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 42171?
Of the 6,723 people the ACS estimates in 42171, 22.9% are under 18 and 16.6% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (90.9%).
- Under 1822.9%
- 18 to 6460.5%
- 65 and older16.6%
- White, not Hispanic90.9%
- Other or two or more3.6%
- Hispanic or Latino2.9%
- Black, not Hispanic2.5%
- Asian, not Hispanic0.0%
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 42171 earn?
Median household income is $70,191 (ACS 2020-2024), the 5th highest of the 7 ranked ZIP codes in Warren County. It is not measurably different from 2015-2019 ($64,865 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $70,191±$7,755
- Income per person
- $32,853
- Below the poverty line
- 10.6%
- Unemployed (of the labor force)
- 4.3%
- Adults 25+ with a bachelor's degree
- 12.3%
- Adjusted gross income per tax return, 2022
- $62,7213,320 returns; wages 74% 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 42171?
FHFA's house price index for 42171, built from repeat sales and appraisals of the same homes, rose 91% from 2015 to 2025 and rose 60% from 2020 to 2025, and moved +2.1% in 2025.
- Median home value (owners' estimate)
- $187,500
- Median gross rent
- $1,008
- Homes owned by their occupants
- 76.2%
- Housing units
- 2,843
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 42171?
86 business establishments had a location in this ZIP code in 2023, 14 more than in 2018; the most are in retail trade (ZIP Code Business Patterns).
- Retail trade20
- Construction12
- Professional, scientific, and technical services10
- Health care and social assistance10
- Accommodation and food services10
- Transportation and warehousing6
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 42171?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 42163 | Rocky Hill | 48 | – | 3.7 mi |
| 42159 | Oakland | 1,699 | $67k | 5.0 mi |
| 42160 | Park City | 2,822 | $49k | 6.9 mi |
| 42259 | Mammoth Cave | 1,090 | $34k | 13.4 mi |
| 42210 | Brownsville | 4,231 | $48k | 14.3 mi |
| 42101 | Bowling Green | 65,421 | $48k | 16.0 mi |
| 42141 | Glasgow | 31,506 | $53k | 16.4 mi |
| 42164 | Scottsville | 17,673 | $60k | 18.4 mi |
| 42103 | Bowling Green | 21,911 | $88k | 9.6 mi (near) |
| 42156 | Lucas | 235 | $98k | 13.8 mi (near) |
| 42127 | Cave City | 7,030 | $43k | 14.9 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.