42120 ZIP Code — Adolphus, KY

Allen County, Kentucky

ZIP code 42120 is located in Adolphus, Kentucky, within Allen County. It covers approximately 43.24 square miles and serves a population of 2,746 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 270/364.

About ZIP code 42120

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1990s, giving the area an established character. Median home value is $171,000. Owner-occupancy is high at 81%, well above the national average.

Median household income is $61,607. 31% 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 33 minutes is near the national average.

Educational attainment is near the national average, with 25% of residents holding a bachelor's degree or higher.

Health indicators show elevated rates of smoking (29%) compared to national benchmarks.

Overall, ZIP code 42120 reflects a community defined by high homeownership and a significant Social Security-dependent population.

2,746

population

43.24

sq mi land

Standard

ZIP type

Central (CT)

timezone

42120 ZIP code map

Cities in ZIP code 42120

Below are the cities the US Postal Service accepts for ZIP code 42120. Using any city not on this list may result in mail delivery delays.

City	Status
Adolphus	Preferred

Nearby ZIP codes

37186 Westmoreland (7.1 mi) 42164 Scottsville (7.7 mi) 42122 Alvaton (13.2 mi) 37022 Bethpage (13.3 mi) 42123 Austin (17.1 mi) 37083 Lafayette (17.4 mi) 42134 Franklin (17.5 mi) 37148 Portland (17.5 mi) 42133 Fountain Run (17.6 mi) 42104 Bowling Green (17.7 mi) 42103 Bowling Green (18.7 mi) 37074 Hartsville (19.4 mi)

Demographics updated 05/2026

Population
Total population	2,746
Population density	64 / sq mi
State FIPS	21
County FIPS	003

Geography
Land area	43.24 sq mi
Water area	0.17 sq mi
Latitude	36.6835
Longitude	-86.2550
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	45.4%	55.4%	47.9%
$50k – $100k	28.0%	30.6%	30.3%
$100k – $200k	23.9%	12.2%	17.6%
Over $200k	2.6%	1.8%	4.2%

Demographics & statistics

2,746

Population

People per sq mi

38.0

Median age

$61,607

Median household income

$25,959

Per capita income

$171,000

Median home value

$624

Median monthly rent

81.3%

Home ownership

12.6%

Poverty rate

8.1%

Unemployment

933

Housing units

24.9%

Bachelor's or higher

Age distribution

Male Female

109

Under 5

109

213

5–9

214

10–14

15–19

20–24

151

25–34

152

243

35–44

244

138

45–54

138

55–59

60–64

131

65–74

131

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	783	28.5%
18 and over	1,963	71.5%
65 and over	358	13.0%
Median age	38.0 years

Race & ethnicity

White 98.6%

Two or more races 1.1%

Asian 0.3%

Group	Count	%
White	2,708	98.6%
Two or more races	31	1.1%
Asian	7	0.3%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	45.4%	55.4%	47.9%
$50k – $100k	28.0%	30.6%	30.3%
$100k – $200k	23.9%	12.2%	17.6%
Over $200k	2.6%	1.8%	4.2%

Under $10k 8.5%

$10k–$15k 2.3%

$15k–$25k 12.0%

$25k–$35k 0.8%

$35k–$50k 17.3%

$50k–$75k 14.5%

$75k–$100k 10.1%

$100k–$150k 26.9%

$150k–$200k 5.6%

$200k+ 2.0%

Range	% of households
Under $10k	8.5%
$10k–$15k	2.3%
$15k–$25k	12.0%
$25k–$35k	0.8%
$35k–$50k	17.3%
$50k–$75k	14.5%
$75k–$100k	10.1%
$100k–$150k	26.9%
$150k–$200k	5.6%
$200k+	2.0%
Median income	$61,607

Housing

Home values

Under $50k 9.6%

$50k–$100k 17.2%

$100k–$150k 14.6%

$150k–$200k 15.0%

$200k–$300k 21.7%

$300k–$500k 21.7%

$500k–$1M 0.3%

Housing overview

Metric	Value
Median home value	$171,000
Median rent / month	$624
Owner occupied	81.3%
Renter occupied	18.7%
Vacant	18.6%
Single-family detached	71.9%
Large apartment buildings	0.0%
Mobile homes	28.1%
Median rooms	5.8
Avg household size (owned)	3.28

Year built

Era	%
2020 or later	5.5%
2010–2019	10.1%
2000–2009	21.8%
1990–1999	24.3%
1980–1989	6.3%
1970–1979	10.5%
1960–1969	3.7%
1950–1959	0.7%
1940–1949	6.4%
1939 or earlier	10.7%

Bedrooms

Size	% of units
No bedroom (studio)	1.1%
1 bedroom	7.4%
2 bedrooms	29.6%
3 bedrooms	45.1%
4 bedrooms	14.3%
5+ bedrooms	2.5%

Vehicles per household

Vehicles	% of households
No vehicle	3.2%
1 vehicle	20.4%
2 vehicles	28.9%
3 or more	47.4%

Heating fuel

Fuel type	%
Utility gas	3.7%
Electricity	77.5%
Propane / LP gas	10.2%
Wood	8.6%

Households & families

Household type	Count	%
Married-couple family	583	65.1%
Cohabiting couple	54	6.0%
Male householder, no spouse	141	15.8%
Female householder, no spouse	117	13.1%
Households with children under 18	363	40.6%
Households with seniors (65+)	258	28.8%
Average household size	3.07

Marital status

Status	Male	Female
Never married	16.2%	35.9%
Married	71.9%	52.3%
Separated	0.0%	0.7%
Widowed	1.7%	3.7%
Divorced	10.2%	7.4%

Education

Less than 9th grade 10.1%

Some HS, no diploma 2.8%

HS graduate 46.6%

Some college, no degree 12.1%

Associate's degree 3.6%

Bachelor's degree 19.1%

Graduate / professional 5.7%

Metric	%
HS diploma or higher	87.1%
Bachelor's or higher	24.9%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	127	18.5%
Kindergarten	32	4.7%
Elementary school	415	60.6%
High school	58	8.5%
College / grad school	53	7.7%

Employment

Industry of employment

Education & healthcare 29.4%

Manufacturing 12.7%

Transportation & utilities 12.6%

Other services 10.5%

Arts, food & hospitality 8.3%

Retail trade 6.0%

Professional & management 5.0%

Wholesale trade 4.8%

Finance & real estate 4.4%

Construction 3.2%

Agriculture & mining 1.6%

Public administration 1.5%

Occupation

Category	%
Management, business & arts	37.3%
Service	19.8%
Sales & office	10.1%
Natural resources & construction	7.3%
Production & transportation	25.5%

Employment type

Type	%
Private sector	77.2%
Government	16.0%
Self-employed	6.3%
Unpaid family workers	0.5%

Commute

Method	%
Drive alone	73.5%
Carpool	12.7%
Public transit	0.0%
Walk	0.0%
Work from home	13.7%
Other means	0.0%
Avg commute (minutes)	33.1

Poverty

All people 12.6%

Under 18 years 19.0%

18 and over 10.1%

Married-couple families 5.1%

Female-led households 43.8%

Income support

Source	% of households
Social Security	30.8%
Retirement income	21.3%
Supplemental Security	1.3%
Cash public assistance	4.4%
Food stamps / SNAP	7.5%

Health indicators

Condition	%
Obesity	39.7%
High blood pressure	42.9%
High cholesterol	36.8%
Diabetes	13.0%
Heart disease	8.4%
Stroke	3.9%
Asthma	12.1%
Arthritis	32.4%
Kidney disease	3.4%
Pulmonary disease	12.8%
Cancer	6.3%

Behavior / access	%
Smoking	28.5%
Binge drinking	15.4%
No physical activity	34.9%
Less than 7 hrs sleep	41.5%
Depression	27.8%
Fair or poor health	24.3%
Poor mental health	20.1%
Poor physical health	16.4%
No health insurance	12.2%
Visited doctor (checkup)	75.1%
Visited dentist	46.4%
Cholesterol screening	87.9%
Teeth loss	23.7%

Veterans & disability

Veterans	Count	%
Civilian veterans	125	6.4%

Disability	%
Any disability	11.0%
Under 18	3.3%
18–64 years	10.5%
65 and over	29.9%

Health insurance coverage

Type	%
Private insurance	58.5%
Public insurance	36.4%
No insurance	13.3%
Uninsured under 19	7.9%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	2,528	92.1%
Spanish	28	1.1%
Other Indo-European	0	0.0%
Asian & Pacific Islander	0	0.0%
Other languages	28	1.1%

Place of birth & citizenship

Origin	Count	%
Native born (US)	2,706	98.5%
Born in same state	2,698	98.3%
Born in different state	1,328	48.4%
Foreign born	8	0.3%
Naturalized citizen	40	1.5%
Not a US citizen	7	17.5%

Ancestry

Ancestry	Count	%
French	628	22.9%
Arab	280	10.2%

Ancestry	Count	%
Italian	200	7.3%
English	5	0.2%

Technology access

Metric	% of households
Computer access	32.6%
Internet access	92.4%

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

Frequently asked questions about ZIP code 42120

What city is ZIP code 42120 in?

ZIP code 42120 is primarily assigned to Adolphus, Kentucky.

What county is ZIP code 42120 in?

ZIP code 42120 falls within Allen County, Kentucky.

Is ZIP code 42120 mostly owner-occupied?

81% of occupied units in ZIP code 42120 are owner-occupied, well above the national average.

What is the typical home value in ZIP code 42120?

The median home value in ZIP code 42120 is $171,000.

What is the population of ZIP code 42120?

ZIP code 42120 has an estimated population of 2,746 residents, with a density of 64 people per square mile.

What is the median household income in ZIP code 42120?

The median household income in ZIP code 42120 is $61,607, below the national median of ~$75,000.

What timezone is ZIP code 42120 in?

ZIP code 42120 observes the CST timezone.