PlainZIP

Casstown, OH · standard

ZIP Code 45312

Miami County, Ohio - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.

1,435
20/sq mi
$91,842
Median income
$279,400
Median home value
22.6%
Bachelor's or higher

The verdict

Casstown pairs an upper-quartile household income with above-median home values, in a rural, homeowner-dominated area.

Top 25%
household income, US ZIPs
Top 37%
home value, US ZIPs
20
people per sq mi
96%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 45312 against every reporting US ZIP.

ZIP code 45312 is a sparsely populated ZIP (a standard USPS delivery area) in Casstown, Miami County, Ohio, home to just 1,435 residents across 71.4 square miles, a density of 20 people per square mile, in the New York time zone.

ZIP 45312 lands in the middle-income range, with a median household income of $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%. Housing costs here run $279,400 for a typical home value (42% above the state average), with rent averaging $1,156 a month; 95.7% of homes are owner-occupied.

Educational attainment sits below the national norm: 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 on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →

Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, 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; 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

How ZIP 45312 ranks nationally

Casstown, OH household income vs. every US ZIP code

Median household income, the full national distribution, with this ZIP marked

$91,842 Top 25% higher than 75% of 30,318 US ZIPs

$0–$20,000: 118 US ZIPs (0%). Below this entry. $20,000–$40,000: 1,573 US ZIPs (5%). Below this entry. $40,000–$60,000: 7,092 US ZIPs (23%). Below this entry. $60,000–$80,000: 9,980 US ZIPs (33%). Below this entry. $80,000–$100,000: 5,778 US ZIPs (19%). This entry sits in this band. $100,000–$120,000: 2,855 US ZIPs (9%). Above this entry. $120,000–$140,000: 1,362 US ZIPs (4%). Above this entry. $140,000–$160,000: 686 US ZIPs (2%). Above this entry. $160,000–$180,000: 364 US ZIPs (1%). Above this entry. $180,000–$200,000: 186 US ZIPs (1%). Above this entry. $200,000–$220,000: 324 US ZIPs (1%). Above this entry. This ZIP $0 $200K+ every reporting US ZIP, bucketed by value

Each bar is a $20K-wide band; taller bars hold more US ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023

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 45312 vs its nearest neighbors, by population

Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.

residents

What this shows Among its immediate neighbors, ZIP 45312 ranks #5 by population - useful context the national average alone can't give.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023

ZIP 45312 vs its nearest neighbors, by median income

Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.

median income

What this shows By household income, ZIP 45312 ranks #3 of 9 neighboring ZIPs, local affluence varies block to block, not just metro to metro.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023
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.

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