PlainZIP

ZIP Code 45312

standard

Source:

Casstown · Miami County · Ohio

Population
1,435

20/sq mi

Median income
$91,842

▲ 20% vs US

higher than 75% of US ZIPs

Median home value
$279,400

▲ 0% vs US

higher than 63% of US ZIPs

Bachelor's or higher
22.6%

Median age 52.7

Land area
71.4 sq mi

New York

ZIP code 45312 in Casstown, Ohio has a population of 1,435. The median household income is $91,842, which is 20% above the national average. Median home value is $279,400, 0% above the US average. 22.6% of residents hold a bachelor's degree or higher.

ZIP code 45312 is classified by USPS as a standard delivery area and covers roughly 71.4 square miles in Casstown, Miami County, Ohio. The area is home to 1,435 residents, producing a population density of 20 people per square mile, and falls within the New York time zone. These USPS and Census boundary values drive every downstream statistic on this page, including the benchmarks that compare 45312 against Ohio and the nation.

On the economic side, the median household income for ZIP 45312 sits at $91,842 (26% above the Ohio average), while per-capita income is $56,478. The poverty rate stands at 2.1% and the unemployment rate at 2.4%. On housing, the median home value is $279,400 (42% above the state average) with median rent at $1,156 per month, and 95.7% of occupied units are owner-occupied, a direct signal of whether 45312 behaves more like a homeowner neighborhood or a renter-heavy ZIP.

Education and household profile round out the picture: 22.6% of adults hold a bachelor's degree or higher, the median age is 52.7, and the average commute is —. We also surface 9 nearby ZIP codes within roughly 10 miles and 6 additional ZIPs sharing Miami County, so you can benchmark 45312 against its immediate geography rather than a national average alone. Every figure is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates, HUD Fair Market Rents, and FHFA Home Price Index data, no estimates, no proprietary scoring. Verify with HUD →

Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + HUD FMR + FHFA HPI ACS demographics, ZBP business establishments, HUD Fair Market Rents, FHFA HPI for ZIP 45312, Casstown, OH · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; HUD FMR + FHFA HPI updated quarterly/annually.

Quick Facts

1,435

Population

71.4

Area (sq mi)

20

People / sq mi

New York

Time Zone

standard

ZIP Type

Neighborhood Scorecard
Get an A-F grade across income, safety, housing, rent, education, commute, and childcare for this ZIP code.
View Scorecard →

Who lives in ZIP 45312?

52.7

Median Age

54.3%

Male

45.7%

Female

0.0%

Foreign-Born

White 96.0%
African American 0.0%
Asian 0.0%
American Indian or Alaska Native 0.0%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 4.0%
Hispanic or Latino 0.0%

Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How much do residents earn?

$91,842

Median Household Income

+26% vs state

$56,478

Per Capita Income

2.1%

Poverty Rate

2.4%

Unemployment Rate

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What is the education profile here?

High School Graduate or Higher 57.5%
Bachelor's Degree or Higher 22.6%

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What does housing look like?

518

Total Housing Units

484

Occupied Units

34

Vacant Units

2.24

Avg Household Size

Occupancy Type

Owner 95.7%
Renter 4.3%

$279,400

Median Home Value

+42% vs state

$1,156

Median Rent

1970

Median Year Built

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How have home values changed over time?

FHFA House Price Index, annual appreciation data based on repeat sales and appraisals

+24.1%

YoY Change (2023)

192

HPI Index (2000 = 100)

+92%

Total Change Since 2000

Home values in ZIP 45312 have increased 24.1% over the past year (2023). Since 2000, this ZIP has seen +92% cumulative appreciation.

Year Annual Change HPI Index
2019 +9.7% 138
2020 +8.6% 150
2021 +9.8% 164
2022 -5.7% 155
2023 +24.1% 192

Source: Federal Housing Finance Agency (FHFA) House Price Index, All-Transactions, Five-Digit ZIP Codes (Developmental Index). Index base = 100 in year 2000. Data through 2023. ZIP codes with few transactions may show missing values.

What businesses operate in this ZIP?

Census Bureau data shows 15 business establishments in ZIP 45312, employing approximately 25 people with a combined annual payroll of $1,844,000.

15

Businesses

25

Employees

$1.8M

Annual Payroll

2

Industry Sectors

Industry Establishments % of Total
Construction 4 26.7%
Professional, scientific, and technical services 3 20.0%

Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.

Nearby ZIP Codes

Want a side-by-side? Compare 45312 vs 45389 →

ZIP Code City Population Distance
45389 Christiansburg, OH 521 2.8 mi
45326 Fletcher, OH 1,179 5.7 mi
45373 Troy, OH 35,131 6.4 mi
45344 New Carlisle, OH 16,955 8.1 mi
45317 Conover, OH 1,180 8.6 mi
43072 Saint Paris, OH 5,948 7.6 mi
45371 Tipp City, OH 18,333 9.4 mi
45349 North Hampton, OH 427 8.8 mi
45319 Donnelsville, OH 293 12.3 mi

More ZIP Codes in Miami County

45373 standard
Troy, OH
Pop: 35,131
45356 standard
Piqua, OH
Pop: 25,172
45371 standard
Tipp City, OH
Pop: 18,333
45383 standard
West Milton, OH
Pop: 7,037
45318 standard
Covington, OH
Pop: 5,365
45359 standard
Pleasant Hill, OH
Pop: 1,970

Related Areas

Miami County Casstown, OH Ohio

Frequently Asked Questions

What county is ZIP code 45312 in? ▼
ZIP code 45312 (Casstown) is located in Miami County, Ohio. Miami County contains multiple ZIP codes, see the full list at /counties/miami-oh.
What is the population of ZIP code 45312? ▼
ZIP code 45312 in Casstown, OH has a population of 1,435 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 45312? ▼
The median household income in ZIP 45312 is $91,842, which is 20% above the national average of $76,288.
What is the average home value in ZIP 45312? ▼
The median home value in ZIP 45312 is $279,400, which is 0% above the national average of $278,155.
What is the demographic makeup of ZIP 45312? ▼
The largest racial group in ZIP 45312 is White at 96.0%.
How many businesses are in ZIP code 45312? ▼
ZIP code 45312 has 15 business establishments employing approximately 25 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
How have home values changed in ZIP code 45312? ▼
According to the FHFA House Price Index, home values in ZIP 45312 increased by 24.1% in 2023. Since 2000, home values in this ZIP have appreciated by approximately 92%. This is a developmental index based on repeat sales and appraisal data from Fannie Mae and Freddie Mac.
What is the education level in ZIP code 45312? ▼
In ZIP code 45312, 57.5% of residents aged 25+ have a high school diploma or higher, and 22.6% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What percentage of residents own vs. rent in ZIP 45312? ▼
In ZIP code 45312, approximately 95.7% of occupied housing units are owner-occupied and 4.3% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 45312? ▼
The poverty rate in ZIP code 45312 is 2.1% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.

ZIP Code Research Guides

Reading Census Demographics
How to interpret population, income, and education data from the Census Bureau.
Understanding ZIP Code Data
What ZIP codes are, how ZCTAs differ, and what the data reveals.
Best ZIP Codes for Families
Key factors to evaluate when choosing a family-friendly neighborhood.
ZIP Codes for Relocation
Data-driven tips for evaluating ZIP codes before a move.

Official Data Resources for Casstown, OH

Verify and explore additional data for this area using these official government sources.

U.S. Census Bureau
Official demographic, economic, and housing data from the American Community Survey.
HUD Fair Market Rents
Department of Housing and Urban Development rental cost estimates by metropolitan area.
FBI Uniform Crime Reports
Official crime statistics compiled from law enforcement agencies nationwide.
FHFA House Price Index
Federal Housing Finance Agency home value trends based on repeat sales and appraisals.

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023). Business data: Source: Census ZIP Code Business Patterns (ZBP) 2023. Home value trends: Source: FHFA House Price Index (HPI), Five-Digit ZIP Codes.

PlainZIP is not affiliated with the U.S. Census Bureau or any government agency.

Read our methodology , how this data is sourced, computed, and verified.