42171 ZIP Code — Smiths Grove, KY

Warren County, Kentucky

ZIP code 42171 is located in Smiths Grove, Kentucky, within Warren County. It covers approximately 103.28 square miles and serves a population of 7,073 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 270/364.

About ZIP code 42171

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 $198,500. Owner-occupancy is high at 81%, well above the national average.

Median household income is $63,103. 32% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 32 minutes is near the national average.

College attainment at 16% is below the national average, consistent with a trades and production-oriented local economy.

Health indicators show elevated rates of smoking (25%) compared to national benchmarks.

Overall, ZIP code 42171 reflects a community defined by a trades-oriented workforce, high homeownership, and a significant Social Security-dependent population.

7,073

population

103.28

sq mi land

Standard

ZIP type

Central (CT)

timezone

42171 ZIP code map

Cities in ZIP code 42171

Below are the cities the US Postal Service accepts for ZIP code 42171. Using any city not on this list may result in mail delivery delays.

City	Status
Smiths Grove	Preferred

Nearby ZIP codes

42163 Rocky Hill (4 mi) 42159 Oakland (5.4 mi) 42160 Park City (5.5 mi) 42103 Bowling Green (11.1 mi) 42259 Mammoth Cave (13.2 mi) 42141 Glasgow (14 mi) 42210 Brownsville (14.3 mi) 42127 Cave City (15.5 mi) 42122 Alvaton (15.8 mi) 42101 Bowling Green (16.3 mi) 42285 Sweeden (17.2 mi) 42164 Scottsville (17.7 mi)

Demographics updated 05/2026

Population
Total population	7,073
Population density	68 / sq mi
State FIPS	21
County FIPS	227

Geography
Land area	103.28 sq mi
Water area	0.52 sq mi
Latitude	37.0373
Longitude	-86.1686
Timezone	Central (CT)
Area code	270/364

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	42.7%	46.4%	47.9%
$50k – $100k	32.7%	31.8%	30.3%
$100k – $200k	20.5%	17.3%	17.6%
Over $200k	4.1%	4.5%	4.2%

Demographics & statistics

7,073

Population

People per sq mi

39.7

Median age

$63,103

Median household income

$28,438

Per capita income

$198,500

Median home value

$836

Median monthly rent

80.5%

Home ownership

16.4%

Poverty rate

3.9%

Unemployment

2,453

Housing units

15.6%

Bachelor's or higher

Age distribution

Male Female

199

Under 5

178

229

5–9

203

326

10–14

290

296

15–19

263

162

20–24

145

388

25–34

346

517

35–44

461

632

45–54

562

319

55–59

284

178

60–64

158

355

65–74

317

131

75–84

117

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	1,811	25.6%
18 and over	5,262	74.4%
65 and over	937	13.2%
Median age	39.7 years

Race & ethnicity

White 93.5%

Two or more races 3.3%

Black or African American 2.1%

Asian 0.6%

Hispanic or Latino 0.3%

American Indian / Alaska Native 0.2%

Group	Count	%
White	6,636	93.5%
Two or more races	233	3.3%
Black or African American	147	2.1%
Asian	43	0.6%
Hispanic or Latino	24	0.3%
American Indian / Alaska Native	14	0.2%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	42.7%	46.4%	47.9%
$50k – $100k	32.7%	31.8%	30.3%
$100k – $200k	20.5%	17.3%	17.6%
Over $200k	4.1%	4.5%	4.2%

Under $10k 2.5%

$10k–$15k 5.5%

$15k–$25k 9.9%

$25k–$35k 6.9%

$35k–$50k 15.1%

$50k–$75k 16.9%

$75k–$100k 18.6%

$100k–$150k 17.0%

$150k–$200k 5.3%

$200k+ 2.3%

Range	% of households
Under $10k	2.5%
$10k–$15k	5.5%
$15k–$25k	9.9%
$25k–$35k	6.9%
$35k–$50k	15.1%
$50k–$75k	16.9%
$75k–$100k	18.6%
$100k–$150k	17.0%
$150k–$200k	5.3%
$200k+	2.3%
Median income	$63,103

Housing

Home values

Under $50k 9.7%

$50k–$100k 12.2%

$100k–$150k 18.2%

$150k–$200k 10.1%

$200k–$300k 31.3%

$300k–$500k 15.2%

$500k–$1M 3.3%

Housing overview

Metric	Value
Median home value	$198,500
Median rent / month	$836
Owner occupied	80.5%
Renter occupied	19.5%
Vacant	11.8%
Single-family detached	75.8%
Large apartment buildings	0.0%
Mobile homes	21.3%
Median rooms	6.0
Avg household size (owned)	2.78

Year built

Era	%
2020 or later	2.2%
2010–2019	11.7%
2000–2009	24.2%
1990–1999	20.8%
1980–1989	9.9%
1970–1979	7.3%
1960–1969	5.7%
1950–1959	5.6%
1940–1949	1.0%
1939 or earlier	11.5%

Bedrooms

Size	% of units
No bedroom (studio)	0.5%
1 bedroom	1.5%
2 bedrooms	18.9%
3 bedrooms	58.7%
4 bedrooms	15.2%
5+ bedrooms	5.2%

Vehicles per household

Vehicles	% of households
No vehicle	3.4%
1 vehicle	25.1%
2 vehicles	42.2%
3 or more	29.4%

Heating fuel

Fuel type	%
Utility gas	11.8%
Electricity	71.3%
Propane / LP gas	13.3%
Wood	3.2%

Households & families

Household type	Count	%
Married-couple family	1,476	56.5%
Cohabiting couple	244	9.3%
Male householder, no spouse	374	14.3%
Female householder, no spouse	518	19.8%
Households with children under 18	921	35.3%
Households with seniors (65+)	722	27.6%
Average household size	2.71

Marital status

Status	Male	Female
Never married	26.9%	16.6%
Married	54.4%	57.9%
Separated	6.4%	2.3%
Widowed	2.6%	9.9%
Divorced	9.6%	13.3%

Education

Less than 9th grade 4.7%

Some HS, no diploma 6.9%

HS graduate 41.4%

Some college, no degree 24.2%

Associate's degree 7.2%

Bachelor's degree 9.8%

Graduate / professional 5.8%

Metric	%
HS diploma or higher	88.4%
Bachelor's or higher	15.6%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	24	1.6%
Kindergarten	125	8.1%
Elementary school	781	50.8%
High school	507	33.0%
College / grad school	101	6.6%

Employment

Industry of employment

Education & healthcare 23.1%

Manufacturing 15.8%

Retail trade 12.2%

Professional & management 11.5%

Arts, food & hospitality 8.5%

Construction 8.0%

Transportation & utilities 5.7%

Public administration 5.2%

Other services 3.9%

Agriculture & mining 2.2%

Finance & real estate 1.9%

Wholesale trade 1.7%

Information 0.2%

Occupation

Category	%
Management, business & arts	30.3%
Service	19.4%
Sales & office	16.1%
Natural resources & construction	15.1%
Production & transportation	19.1%

Employment type

Type	%
Private sector	75.1%
Government	13.4%
Self-employed	11.5%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	84.2%
Carpool	10.7%
Public transit	0.0%
Walk	0.3%
Work from home	4.1%
Other means	0.7%
Avg commute (minutes)	31.9

Poverty

All people 16.4%

Under 18 years 23.2%

18 and over 14.3%

Married-couple families 5.8%

Female-led households 40.8%

Income support

Source	% of households
Social Security	32.1%
Retirement income	31.3%
Supplemental Security	3.8%
Cash public assistance	0.6%
Food stamps / SNAP	8.7%

Health indicators

Condition	%
Obesity	38.4%
High blood pressure	39.8%
High cholesterol	36.4%
Diabetes	11.5%
Heart disease	7.5%
Stroke	3.5%
Asthma	11.4%
Arthritis	30.7%
Kidney disease	3.1%
Pulmonary disease	10.5%
Cancer	6.5%

Behavior / access	%
Smoking	24.8%
Binge drinking	15.7%
No physical activity	31.8%
Less than 7 hrs sleep	37.6%
Depression	26.7%
Fair or poor health	20.5%
Poor mental health	18.5%
Poor physical health	14.2%
No health insurance	11.2%
Visited doctor (checkup)	76.1%
Visited dentist	53.3%
Cholesterol screening	89.3%
Teeth loss	19.6%

Veterans & disability

Veterans	Count	%
Civilian veterans	270	5.1%

Disability	%
Any disability	16.6%
Under 18	2.9%
18–64 years	18.8%
65 and over	32.8%

Health insurance coverage

Type	%
Private insurance	62.6%
Public insurance	41.6%
No insurance	5.9%
Uninsured under 19	7.3%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	6,696	94.7%
Spanish	2	0.0%
Other Indo-European	0	0.0%
Asian & Pacific Islander	2	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	7,027	99.3%
Born in same state	7,025	99.3%
Born in different state	5,508	77.9%
Foreign born	2	0.0%
Naturalized citizen	46	0.7%
Not a US citizen	44	95.7%

Ancestry

Ancestry	Count	%
Arab	1,478	20.9%
Italian	809	11.4%
French	662	9.4%
German	171	2.4%

Ancestry	Count	%
Polish	69	1%
English	12	0.2%
Dutch	3	0%

Technology access

Metric	% of households
Computer access	36.9%
Internet access	91.2%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions about ZIP code 42171

What city is ZIP code 42171 in?

ZIP code 42171 is primarily assigned to Smiths Grove, Kentucky.

What county is ZIP code 42171 in?

ZIP code 42171 falls within Warren County, Kentucky.

What is the poverty rate in ZIP code 42171?

16% of residents in ZIP code 42171 live below the poverty line, above the national average.

Is ZIP code 42171 mostly owner-occupied?

81% of occupied units in ZIP code 42171 are owner-occupied, well above the national average.

What is the population of ZIP code 42171?

ZIP code 42171 has an estimated population of 7,073 residents, with a density of 68 people per square mile.

What is the typical home value in ZIP code 42171?

The median home value in ZIP code 42171 is $198,500.

What timezone is ZIP code 42171 in?

ZIP code 42171 observes the CST timezone.