Zip Code 45040
Mason, Ohio — Warren County
📍 ZIP code 45040 is in Mason, Warren County, Ohio.
ZIP code 45040 is located in Mason, Warren County, Ohio. It is a zip code in the Eastern (EST/EDT) Time Zone with an estimated population of 58,132. The area code for ZIP code 45040 is 513.
Quick Answer
Zip code 45040 is in Mason, Ohio (Warren County). It has a population of 58,132, median household income of $131,803, and median home value of $403,700.
Population
58,132
Income
$131,803
Home Value
$403,700
Climate
87°F / 22°F
About Zip Code 45040
Zip code 45040 is located in Mason, Ohio, within Warren County. Home to approximately 58,132 residents, this area sits at an elevation of 830 ft and falls within the Eastern (EST/EDT) timezone. The local area code is 513.
The median household income is $131,803 per year, which is above the national median of $70,784. Homes in this zip code have a median value of $403,700, and the cost of living index is 150 (50% above the national average of 100).
Summers average a high of 87°F while winters drop to 22°F. The area receives about 41 in of rain and 14 in of snow annually. The zip code covers 28.1 square miles of land area.
Key Statistics
58,132
$131,803
$403,700
Eastern (EST/EDT)
513
830 ft
28.1 sq mi
40.9
21,977
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Compare With Nearby Zip Codes
| Metric | 45040 | 45034 | 45039 | 45249 | 45069 | 45065 |
|---|---|---|---|---|---|---|
| City | Mason, OH | Kings Mills, OH | Maineville, OH | Cincinnati, OH | West Chester, OH | South Lebanon, OH |
| Population | 58,132 | 1,080 | 28,958 | 14,219 | 55,635 | 6,938 |
| Median Income | $131,803 | $152,829 | $111,774 | $107,227 | $115,539 | $107,222 |
| Home Value | $403,700 | $312,100 | $294,100 | $484,500 | $314,300 | $313,100 |
| Cost of Living | 150 | 131 | 118 | 159 | 122 | 96 |
| Median Age | 40.9 | 53.1 | 40.1 | 39.6 | 38.9 | 34.8 |
Cost of Living
100 = National Average. Mason's cost of living is 50% above the national average.
vs. State Avg
Above
Affordability
Expensive
Income-to-Home
3.1x
Demographics
Zip code 45040 has a population of 58,132 people with a median age of 40.9. There are 21,977 housing units in this area.
Racial & Ethnic Composition
Source: U.S. Census Bureau American Community Survey estimates.
Population History
Mason (45040) population trend from 2010 to 2024
↓ -37.6%Source: U.S. Census Bureau estimates and American Community Survey data.
Climate & Weather
87°F
22°F
41 in
14 in
Mason experiences warm summers with average highs around 87°F. Winters are cool with lows averaging 22°F. The area receives about 14 in of snow per year.
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Housing & Economy
Median Home Value
$403,700
Median Household Income
$131,803
With 21,977 housing units across 28.1 square miles, 45040 has a housing density of 782 units per square mile. The home price-to-income ratio is 3.1x.
Location & Geography
Latitude
39.3508°
Longitude
-84.3132°
Land Area
28.1 sq mi
Water Area
0 sq mi
Nearby Zip Codes
Zip codes closest to 45040 (Mason, OH) with distances:
ZIP Codes with Similar Income Nationwide
The five U.S. ZIP codes whose median household income is closest to 45040's $131,803. A way to compare Mason to economically similar communities elsewhere in the country.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
ZIP Codes with Similar Demographics
The five U.S. ZIP codes whose racial and ethnic composition most closely matches 45040 (Mason, OH). Similarity is measured by cosine distance on the five-category ACS demographic vector.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
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People Also Ask
What zip code is Mason, Ohio?
Mason, Ohio uses zip code 45040.
What county is zip code 45040 in?
Zip code 45040 is located in Warren County, Ohio.
What is the population of zip code 45040?
The population of zip code 45040 is 58,132 with a median age of 40.9.
Is 45040 in Mason, Ohio?
Yes, zip code 45040 is in Mason, Warren County, Ohio. The area code is 513.
Frequently Asked Questions
What city is zip code 45040 in?
Zip code 45040 is in Mason, Ohio. It is part of Warren County and uses the Eastern (EST/EDT) timezone.
What is zip code 45040?
Zip code 45040 is a U.S. postal code in Mason, Ohio (Warren County). It has a population of 58,132 and covers 28.1 square miles.
What is the population of zip code 45040?
The population of zip code 45040 (Mason, OH) is 58,132 with a median age of 40.9. There are approximately 21,977 housing units in this area.
What is the median income in zip code 45040?
The median household income in zip code 45040 (Mason, OH) is $131,803 per year. The cost of living index is 150 (100 = national average).
What is the average home price in zip code 45040?
The median home value in zip code 45040 (Mason, OH) is $403,700. The cost of living index is 150 compared to the national average of 100.
What county is zip code 45040 in?
Zip code 45040 is located in Warren County, Ohio. The primary city is Mason.
What is the area code for zip code 45040?
Zip code 45040 in Mason, OH uses area code 513. It is located in the Eastern (EST/EDT) timezone.
Is zip code 45040 a good place to live?
Zip code 45040 (Mason, OH) has a cost of living index of 150 (100 = national average), a median household income of $131,803, and median home values of $403,700. The median age is 40.9. Visit the full page for demographics, climate, and nearby zip code comparisons.
What is the cost of living in zip code 45040?
The cost of living index for zip code 45040 (Mason, OH) is 150, where 100 represents the national average. This area is above the national average. Median home value: $403,700.
What schools serve zip code 45040?
Zip code 45040 in Mason, Ohio is served by the local school district of Warren County. For specific school information, check your state's department of education or GreatSchools.org.
All demographic data on this page is sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code boundary and delivery data is sourced from the United States Postal Service (USPS). Data is updated periodically and may not reflect the most current figures. Census Bureau ZIP Code Tabulation Areas (ZCTAs) may differ slightly from USPS ZIP code boundaries.
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Data Sources
- Population, income, housing, age, and demographics
- U.S. Census Bureau, American Community Survey 5-Year Estimates, 2019-2023 vintage.
- ZIP to city and county mapping
- USPS and HUD-USPS ZIP-County Crosswalk.
- Time zones and area codes
- IANA tz database and NANPA.
- Elevation
- U.S. Geological Survey National Elevation Dataset (NED), via the USGS Elevation Point Query Service. Mapped to each ZCTA centroid coordinates. Last refreshed 2026-05-19.
- Last refreshed
- 2026-05-18.