45123 ZIP Code — Greenfield, OH

Highland County, Ohio

ZIP code 45123 is located in Greenfield, Ohio, within Highland County. It covers approximately 106.76 square miles and serves a population of 8,958 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 937.

About ZIP code 45123

The housing stock consists of predominantly single-family detached homes. Most homes were built in the pre-1940, giving the area an established character. Median home value is $133,200. Owner-occupancy sits near the national average at 65%.

Median household income is $58,623. Poverty affects 21% of residents, above the national average. SNAP benefit usage at 21% of households reflects economic stress in the area. 35% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with manufacturing as the leading industry. The average commute of 34 minutes is near the national average.

College attainment at 15% is below the national average, consistent with a trades and production-oriented local economy.

Health indicators show elevated rates of smoking (30%) compared to national benchmarks.

Overall, ZIP code 45123 reflects a community defined by a trades-oriented workforce, economic challenges above the national average, a significant Social Security-dependent population, and elevated reliance on food assistance.

8,958

population

106.76

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

45123 ZIP code map

Cities in ZIP code 45123

Below are the cities the US Postal Service accepts for ZIP code 45123. Using any city not on this list may result in mail delivery delays.

City	Status
Greenfield	Acceptable
Greenfield	Preferred

Nearby ZIP codes

45681 South Salem (8.5 mi) 45135 Leesburg (9.2 mi) 45628 Frankfort (9.5 mi) 45612 Bainbridge (11 mi) 43160 Washington Court House (14.5 mi) 45133 Hillsboro (15.6 mi) 43115 Clarksburg (15.9 mi) 45159 New Vienna (16.7 mi) 43145 New Holland (16.9 mi) 45646 Latham (18.4 mi) 45169 Sabina (18.8 mi)

Demographics updated 05/2026

Population
Total population	8,958
Population density	84 / sq mi
State FIPS	39
County FIPS	071

Geography
Land area	106.76 sq mi
Water area	1.21 sq mi
Latitude	39.3374
Longitude	-83.3851
Timezone	Eastern (ET)
Area code	937

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	46.2%	50.0%	43.3%
$50k – $100k	34.3%	31.9%	31.4%
$100k – $200k	19.3%	16.7%	20.0%
Over $200k	0.1%	1.4%	5.2%

Demographics & statistics

8,958

Population

People per sq mi

37.1

Median age

$58,623

Median household income

$27,812

Per capita income

$133,200

Median home value

$728

Median monthly rent

64.5%

Home ownership

21.4%

Poverty rate

3.7%

Unemployment

2,691

Housing units

15.3%

Bachelor's or higher

Age distribution

Male Female

443

Under 5

449

192

5–9

194

349

10–14

354

240

15–19

243

286

20–24

290

623

25–34

630

446

35–44

451

664

45–54

672

339

55–59

344

214

60–64

217

472

65–74

477

138

75–84

140

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	2,309	25.8%
18 and over	6,649	74.2%
65 and over	1,318	14.7%
Median age	37.1 years

Race & ethnicity

White 91.7%

Two or more races 3.6%

Black or African American 3%

Hispanic or Latino 1.5%

Other race 0.2%

Group	Count	%
White	8,335	91.7%
Two or more races	325	3.6%
Black or African American	274	3%
Hispanic or Latino	134	1.5%
Other race	21	0.2%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	46.2%	50.0%	43.3%
$50k – $100k	34.3%	31.9%	31.4%
$100k – $200k	19.3%	16.7%	20.0%
Over $200k	0.1%	1.4%	5.2%

Under $10k 10.4%

$10k–$15k 3.3%

$15k–$25k 8.6%

$25k–$35k 6.8%

$35k–$50k 15.6%

$50k–$75k 13.7%

$75k–$100k 13.1%

$100k–$150k 17.4%

$150k–$200k 8.3%

$200k+ 2.8%

Range	% of households
Under $10k	10.4%
$10k–$15k	3.3%
$15k–$25k	8.6%
$25k–$35k	6.8%
$35k–$50k	15.6%
$50k–$75k	13.7%
$75k–$100k	13.1%
$100k–$150k	17.4%
$150k–$200k	8.3%
$200k+	2.8%
Median income	$58,623

Housing

Home values

Under $50k 11.4%

$50k–$100k 20.5%

$100k–$150k 28.5%

$150k–$200k 13.9%

$200k–$300k 15.4%

$300k–$500k 6.1%

$500k–$1M 4.1%

Housing overview

Metric	Value
Median home value	$133,200
Median rent / month	$728
Owner occupied	64.5%
Renter occupied	35.5%
Vacant	14.9%
Single-family detached	78.6%
Large apartment buildings	0.6%
Mobile homes	4.6%
Median rooms	5.9
Avg household size (owned)	2.76

Year built

Era	%
2020 or later	0.0%
2010–2019	1.5%
2000–2009	12.8%
1990–1999	17.7%
1980–1989	5.9%
1970–1979	11.2%
1960–1969	5.2%
1950–1959	13.3%
1940–1949	9.0%
1939 or earlier	23.4%

Bedrooms

Size	% of units
No bedroom (studio)	1.0%
1 bedroom	8.0%
2 bedrooms	27.5%
3 bedrooms	43.3%
4 bedrooms	17.9%
5+ bedrooms	2.2%

Vehicles per household

Vehicles	% of households
No vehicle	7.3%
1 vehicle	24.5%
2 vehicles	36.8%
3 or more	31.4%

Heating fuel

Fuel type	%
Utility gas	39.5%
Electricity	34.8%
Propane / LP gas	13.0%
Fuel oil	4.4%
Wood	3.6%
No fuel used	1.0%

Households & families

Household type	Count	%
Married-couple family	1,840	56.1%
Cohabiting couple	409	12.5%
Male householder, no spouse	410	12.5%
Female householder, no spouse	622	19.0%
Households with children under 18	1,145	34.9%
Households with seniors (65+)	1,041	31.7%
Average household size	2.69

Marital status

Status	Male	Female
Never married	26.2%	24.6%
Married	56.0%	55.5%
Separated	0.1%	1.3%
Widowed	4.9%	7.1%
Divorced	12.8%	11.5%

Education

Less than 9th grade 5.9%

Some HS, no diploma 10.2%

HS graduate 40.4%

Some college, no degree 18.5%

Associate's degree 9.7%

Bachelor's degree 9.3%

Graduate / professional 5.9%

Metric	%
HS diploma or higher	83.9%
Bachelor's or higher	15.3%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	117	6.2%
Kindergarten	72	3.8%
Elementary school	908	48.5%
High school	432	23.1%
College / grad school	344	18.4%

Employment

Industry of employment

Manufacturing 24.4%

Education & healthcare 20.2%

Retail trade 10.4%

Professional & management 9.1%

Construction 8.3%

Transportation & utilities 6.4%

Arts, food & hospitality 5.7%

Public administration 4.5%

Wholesale trade 3.3%

Other services 3.3%

Finance & real estate 2.6%

Information 1.2%

Agriculture & mining 0.8%

Occupation

Category	%
Management, business & arts	32.4%
Service	10.1%
Sales & office	17.8%
Natural resources & construction	12.9%
Production & transportation	26.8%

Employment type

Type	%
Private sector	77.9%
Government	14.6%
Self-employed	7.5%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	78.7%
Carpool	13.1%
Public transit	0.0%
Walk	1.9%
Work from home	6.3%
Other means	0.0%
Avg commute (minutes)	34.4

Poverty

All people 21.4%

Under 18 years 33.1%

18 and over 17.4%

Married-couple families 8.8%

Female-led households 51.7%

Income support

Source	% of households
Social Security	35.0%
Retirement income	20.7%
Supplemental Security	8.5%
Cash public assistance	1.9%
Food stamps / SNAP	21.0%

Health indicators

Condition	%
Obesity	41.1%
High blood pressure	37.5%
High cholesterol	32.6%
Diabetes	13.1%
Heart disease	8.7%
Stroke	4.2%
Asthma	11.3%
Arthritis	32.1%
Kidney disease	3.5%
Pulmonary disease	12.2%
Cancer	6.9%

Behavior / access	%
Smoking	29.6%
Binge drinking	15.9%
No physical activity	32.8%
Less than 7 hrs sleep	37.7%
Depression	26.3%
Fair or poor health	20.5%
Poor mental health	18.4%
Poor physical health	13.8%
No health insurance	14.5%
Visited doctor (checkup)	75.6%
Visited dentist	53.6%
Cholesterol screening	85.9%
Teeth loss	23.9%

Veterans & disability

Veterans	Count	%
Civilian veterans	379	5.7%

Disability	%
Any disability	18.1%
Under 18	4.5%
18–64 years	18.7%
65 and over	40.8%

Health insurance coverage

Type	%
Private insurance	61.3%
Public insurance	42.7%
No insurance	6.4%
Uninsured under 19	4.6%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	8,066	90.0%
Spanish	54	0.7%
Other Indo-European	40	0.5%
Asian & Pacific Islander	14	0.2%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	8,927	99.7%
Born in same state	8,854	98.8%
Born in different state	7,970	89.0%
Foreign born	73	0.8%
Naturalized citizen	31	0.3%
Not a US citizen	24	77.4%

Ancestry

Ancestry	Count	%
Arab	1,318	14.7%
Italian	1,254	14%
French	988	11%
Irish	34	0.4%

Ancestry	Count	%
English	20	0.2%
Dutch	11	0.1%
Polish	10	0.1%

Technology access

Metric	% of households
Computer access	36.6%
Internet access	87.7%

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

Frequently asked questions about ZIP code 45123

What city is ZIP code 45123 in?

ZIP code 45123 is primarily assigned to Greenfield, Ohio.

What county is ZIP code 45123 in?

ZIP code 45123 falls within Highland County, Ohio.

What is the poverty rate in ZIP code 45123?

21% of residents in ZIP code 45123 live below the poverty line, above the national average.

What is the typical home value in ZIP code 45123?

The median home value in ZIP code 45123 is $133,200.

What is the population of ZIP code 45123?

ZIP code 45123 has an estimated population of 8,958 residents, with a density of 84 people per square mile.

What is the median household income in ZIP code 45123?

The median household income in ZIP code 45123 is $58,623, below the national median of ~$75,000.

What timezone is ZIP code 45123 in?

ZIP code 45123 observes the EST timezone.