Residential delivery area · Ohio
ZIP Code 45312: Casstown, OH
ZIP code 45312 uses the postal name Casstown, Ohio and lies mostly in Miami County (98% of its land) with the rest in Champaign County (Census 2020 ZIP-county file). About 1,100 people live there (Census Bureau, ACS 2020-2024). Median household income is $91,842 (Census Bureau, ACS 2020-2024). By Census place, under 1% of its land lies in Casstown; more than 99% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2023
- ZBP2023
- IRS2022
- Town
- Casstown · its only residential ZIP
- County
- Miami County (98%); Champaign County (2%)
- Census places
- Casstown
- Metro area
- Dayton-Kettering-Beavercreek, OH
- House districts
- OH-15 (98%), OH-4 (2%) 119th Congress, by share of land
- State
- Ohio
- Time zone
- Eastern
- Land area
- 27.3 sq mi · 40 people per sq mi
Where is ZIP code 45312?
45312 centers on 40.052°, -84.093° and covers 27.3 square miles of land plus 0.0 of water. It borders 6 ZIP codes: 45389, 45373, 45326, 45344, 43072, 45317.
The map draws ZIP code areas only. For the streets inside 45312, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 45312 compare with the rest of Miami County?
| Measure | 45312 | In Miami County | In OH |
|---|---|---|---|
| People (ACS 2020-2024) | 1,086 | 15th of 17 | 914th of 1,233 |
| Median household income | $92k | not ranked | not ranked |
| Median home value | $279k | 2nd of 14 | 148th of 810 |
45312's median household income is not ranked: its 90% margin of error (±$25,281) is more than a quarter of the figure ($91,842). Rankings use ZIP codes of 1,000 or more people living in households, with margins at most 25% of the figure.
It is denser than 38% of U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 45312?
The 2020 Census counted 1,416 people in 45312; the ACS, which samples households over 2020-2024, estimates 1,086. Between the 2010 and 2020 censuses its population fell 1.3% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 1,086±245 (90% margin)
- 2020 Census count
- 1,416−1.3% since 2010 (1,435)
- Households
- 484
- Median age
- 52.7
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 45312?
Of the 1,086 people the ACS estimates in 45312, 18.1% are under 18 and 34.8% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (96.0%).
- Under 1818.1%
- 18 to 6447.1%
- 65 and older34.8%
- White, not Hispanic96.0%
- Other or two or more4.0%
- Hispanic or Latino0.0%
- Black, not Hispanic0.0%
- Asian, not Hispanic0.0%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 45312 earn?
Median household income is $91,842 (ACS 2020-2024). It is not measurably different from 2015-2019 ($85,556 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $91,842±$25,281
- Income per person
- $56,478
- Below the poverty line
- 2.1%
- Unemployed (of the labor force)
- 2.4%
- Adults 25+ with a bachelor's degree
- 22.6%
- Adjusted gross income per tax return, 2022
- $84,086720 returns; wages 66% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 45312?
- Median home value (owners' estimate)
- $279,400
- Median gross rent
- $1,156
- Homes owned by their occupants
- 95.7%
- Housing units
- 518
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 45312?
15 business establishments had a location in this ZIP code in 2023, 2 more than in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction4
- Professional, scientific, and technical services3
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 45312?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 45389 | Christiansburg | 708 | $62k | 3.6 mi |
| 45373 | Troy | 37,565 | $76k | 5.6 mi |
| 45326 | Fletcher | 1,446 | $94k | 6.1 mi |
| 45344 | New Carlisle | 16,979 | $79k | 8.1 mi |
| 43072 | Saint Paris | 5,253 | $76k | 8.5 mi |
| 45317 | Conover | 1,187 | $61k | 9.6 mi |
| 45371 | Tipp City | 22,865 | $94k | 8.6 mi (near) |
| 45349 | North Hampton | 234 | $77k | 9.2 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.