45040 ZIP Code — Mason, OH

Warren County, Ohio

ZIP code 45040 is located in Mason, Ohio, within Warren County. It covers approximately 28.45 square miles and serves a population of 57,214 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 513.

About ZIP code 45040

The housing stock consists of a mix of housing types. Most homes were built in the 1990s, giving the area an established character. Median home value is $379,300. Owner-occupancy is high at 77%, well above the national average.

The gap between median ($128,034) and mean household income suggests income inequality — a small number of higher earners pull the average up. The poverty rate of 4% is below the national average.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 25 minutes is near the national average.

Educational attainment is high — 66% of residents hold a bachelor's degree or higher, well above the national average of 33%.

Overall, ZIP code 45040 reflects a community defined by a highly educated population and high homeownership.

57,214

population

28.45

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

45040 ZIP code map

Cities in ZIP code 45040

Below are the cities the US Postal Service accepts for ZIP code 45040. Using any city not on this list may result in mail delivery delays.

City	Status
Mason	Preferred

Nearby ZIP codes

45034 Kings Mills (2.9 mi) 45039 Maineville (3.5 mi) 45039 Maineville (3.5 mi) 45065 South Lebanon (5.5 mi) 45249 Cincinnati (5.8 mi) 45069 West Chester (6.2 mi) 45050 Monroe (7.2 mi) 45044 Middletown (7.3 mi) 45044 Middletown (7.3 mi) 45140 Loveland (7.4 mi) 45241 Cincinnati (7.4 mi) 45241 Cincinnati (7.4 mi)

Demographics updated 05/2026

Population
Total population	57,214
Population density	2,011 / sq mi
State FIPS	39
County FIPS	165

Geography
Land area	28.45 sq mi
Water area	0.05 sq mi
Latitude	39.3524
Longitude	-84.3003
Timezone	Eastern (ET)
Area code	513

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	17.9%	24.5%	43.3%
$50k – $100k	27.3%	30.8%	31.4%
$100k – $200k	32.8%	30.8%	20.0%
Over $200k	21.9%	14.0%	5.2%

Demographics & statistics

57,214

Population

2,011

People per sq mi

39.6

Median age

$128,034

Median household income

$59,290

Per capita income

$379,300

Median home value

$1,643

Median monthly rent

76.5%

Home ownership

4.1%

Poverty rate

2.2%

Unemployment

16,505

Housing units

65.5%

Bachelor's or higher

Age distribution

Male Female

1,376

Under 5

1,415

1,943

5–9

1,997

2,546

10–14

2,617

2,316

15–19

2,381

1,326

20–24

1,363

2,795

25–34

2,873

4,305

35–44

4,425

4,349

45–54

4,470

2,066

55–59

2,124

1,709

60–64

1,756

1,910

65–74

1,962

1,141

75–84

1,173

432

85+

444

← Male

Female →

Age summary

Group	Count	%
Under 18	15,093	26.4%
18 and over	42,121	73.6%
65 and over	7,062	12.3%
Median age	39.6 years

Race & ethnicity

White 68.1%

Asian 18.8%

Two or more races 4.6%

Black or African American 4.2%

Hispanic or Latino 3.5%

Other race 0.8%

American Indian / Alaska Native 0.1%

Group	Count	%
White	40,355	68.1%
Asian	11,122	18.8%
Two or more races	2,698	4.6%
Black or African American	2,511	4.2%
Hispanic or Latino	2,048	3.5%
Other race	493	0.8%
American Indian / Alaska Native	35	0.1%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	17.9%	24.5%	43.3%
$50k – $100k	27.3%	30.8%	31.4%
$100k – $200k	32.8%	30.8%	20.0%
Over $200k	21.9%	14.0%	5.2%

Under $10k 1.3%

$10k–$15k 1.0%

$15k–$25k 4.5%

$25k–$35k 1.8%

$35k–$50k 5.9%

$50k–$75k 9.3%

$75k–$100k 13.4%

$100k–$150k 21.0%

$150k–$200k 12.5%

$200k+ 29.2%

Range	% of households
Under $10k	1.3%
$10k–$15k	1.0%
$15k–$25k	4.5%
$25k–$35k	1.8%
$35k–$50k	5.9%
$50k–$75k	9.3%
$75k–$100k	13.4%
$100k–$150k	21.0%
$150k–$200k	12.5%
$200k+	29.2%
Median income	$128,034

Housing

Home values

Under $50k 0.4%

$50k–$100k 1.8%

$100k–$150k 3.6%

$150k–$200k 8.0%

$200k–$300k 23.3%

$300k–$500k 34.4%

$500k–$1M 24.3%

$1M+ 4.2%

Housing overview

Metric	Value
Median home value	$379,300
Median rent / month	$1,643
Owner occupied	76.5%
Renter occupied	23.5%
Vacant	3.6%
Single-family detached	68.2%
Large apartment buildings	2.3%
Mobile homes	0.5%
Median rooms	7.2
Avg household size (owned)	2.87

Year built

Era	%
2020 or later	0.6%
2010–2019	14.8%
2000–2009	25.7%
1990–1999	30.3%
1980–1989	9.3%
1970–1979	11.1%
1960–1969	2.9%
1950–1959	2.4%
1940–1949	0.5%
1939 or earlier	2.3%

Bedrooms

Size	% of units
No bedroom (studio)	0.7%
1 bedroom	3.8%
2 bedrooms	21.9%
3 bedrooms	28.7%
4 bedrooms	33.6%
5+ bedrooms	11.2%

Vehicles per household

Vehicles	% of households
No vehicle	1.5%
1 vehicle	25.0%
2 vehicles	45.6%
3 or more	28.0%

Heating fuel

Fuel type	%
Utility gas	57.5%
Electricity	39.5%
Propane / LP gas	1.2%
Fuel oil	0.5%
Wood	0.2%
No fuel used	0.5%

Households & families

Household type	Count	%
Married-couple family	13,935	67.8%
Cohabiting couple	1,033	5.0%
Male householder, no spouse	1,811	8.8%
Female householder, no spouse	3,779	18.4%
Households with children under 18	8,572	41.7%
Households with seniors (65+)	4,763	23.2%
Average household size	2.76

Marital status

Status	Male	Female
Never married	25.0%	24.8%
Married	66.8%	58.7%
Separated	0.4%	0.7%
Widowed	1.8%	5.6%
Divorced	6.0%	10.2%

Education

Less than 9th grade 0.7%

Some HS, no diploma 1.5%

HS graduate 13.0%

Some college, no degree 11.9%

Associate's degree 7.3%

Bachelor's degree 37.2%

Graduate / professional 28.3%

Metric	%
HS diploma or higher	97.7%
Bachelor's or higher	65.5%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	982	5.8%
Kindergarten	741	4.4%
Elementary school	7,327	43.4%
High school	4,376	25.9%
College / grad school	3,468	20.5%

Employment

Industry of employment

Education & healthcare 25.0%

Professional & management 20.1%

Manufacturing 16.3%

Retail trade 9.7%

Finance & real estate 8.6%

Arts, food & hospitality 6.3%

Other services 3.2%

Transportation & utilities 2.9%

Public administration 2.9%

Wholesale trade 1.9%

Construction 1.8%

Information 1.2%

Agriculture & mining 0.2%

Occupation

Category	%
Management, business & arts	65.1%
Service	8.8%
Sales & office	18.7%
Natural resources & construction	1.8%
Production & transportation	5.7%

Employment type

Type	%
Private sector	83.2%
Government	12.2%
Self-employed	4.5%
Unpaid family workers	0.1%

Commute

Method	%
Drive alone	74.5%
Carpool	4.6%
Public transit	0.4%
Walk	0.4%
Work from home	19.1%
Other means	1.0%
Avg commute (minutes)	25.0

Poverty

All people 4.1%

Under 18 years 4.9%

18 and over 3.7%

Married-couple families 3.3%

Female-led households 12.6%

Income support

Source	% of households
Social Security	23.2%
Retirement income	22.3%
Supplemental Security	1.8%
Cash public assistance	0.6%
Food stamps / SNAP	2.1%

Health indicators

Condition	%
Obesity	34.1%
High blood pressure	25.6%
High cholesterol	29.0%
Diabetes	7.6%
Heart disease	4.4%
Stroke	1.9%
Asthma	8.8%
Arthritis	20.6%
Kidney disease	2.0%
Pulmonary disease	4.7%
Cancer	5.7%

Behavior / access	%
Smoking	13.8%
Binge drinking	17.0%
No physical activity	17.2%
Less than 7 hrs sleep	32.8%
Depression	20.3%
Fair or poor health	8.7%
Poor mental health	13.3%
Poor physical health	6.8%
No health insurance	8.2%
Visited doctor (checkup)	76.2%
Visited dentist	74.6%
Cholesterol screening	91.4%
Teeth loss	8.4%

Veterans & disability

Veterans	Count	%
Civilian veterans	2,382	5.7%

Disability	%
Any disability	7.8%
Under 18	2.7%
18–64 years	4.7%
65 and over	34.9%

Health insurance coverage

Type	%
Private insurance	89.7%
Public insurance	16.7%
No insurance	2.4%
Uninsured under 19	1.5%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	54,423	95.1%
Spanish	3,147	5.8%
Other Indo-European	156	0.3%
Asian & Pacific Islander	782	1.4%
Other languages	2,016	3.7%

Place of birth & citizenship

Origin	Count	%
Native born (US)	46,061	80.5%
Born in same state	45,094	78.8%
Born in different state	28,602	50.0%
Foreign born	967	1.7%
Naturalized citizen	11,153	19.5%
Not a US citizen	5,022	45.0%

Ancestry

Ancestry	Count	%
Italian	7,192	12.6%
French	6,298	11%
Arab	2,216	3.9%
Irish	559	1%
English	453	0.8%

Ancestry	Count	%
Polish	211	0.4%
German	137	0.2%
Dutch	68	0.1%
Norwegian	65	0.1%

Technology access

Metric	% of households
Computer access	35.9%
Internet access	98.6%

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

Frequently asked questions about ZIP code 45040

What part of Mason is ZIP code 45040?

ZIP code 45040 covers a portion of Mason, Ohio, within Warren County.

What county is ZIP code 45040 in?

ZIP code 45040 falls within Warren County, Ohio.

How educated is the population of ZIP code 45040?

66% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.

What is the median household income in ZIP code 45040?

The median household income in ZIP code 45040 is $128,034, above the national median of ~$75,000.

What is the typical home value in ZIP code 45040?

The median home value in ZIP code 45040 is $379,300.

What is the population of ZIP code 45040?

ZIP code 45040 has an estimated population of 57,214 residents, with a density of 2,011 people per square mile.

What timezone is ZIP code 45040 in?

ZIP code 45040 observes the EST timezone.