Residential delivery area · Ohio
ZIP Code 45373: Troy, OH
ZIP code 45373 uses the postal name Troy, Ohio and lies entirely in Miami County (Census 2020 ZIP-county file). About 38,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $75,742 (Census Bureau, ACS 2020-2024). By Census place, 14% of its land lies in Troy, and under 1% in smaller places; 86% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Troy · its only residential ZIP
- County
- Miami County
- Census places
- Troy
- Metro area
- Dayton-Kettering-Beavercreek, OH
- House districts
- OH-15 (85%), OH-8 (15%) 119th Congress, by share of land
- State
- Ohio
- Time zone
- Eastern
- Land area
- 87.7 sq mi · 428 people per sq mi
- PO Box ZIPs
- 45374 also use the name Troy
Where is ZIP code 45373?
45373 centers on 40.033°, -84.196° and covers 87.7 square miles of land plus 0.7 of water. It borders 9 ZIP codes: 45312, 45371, 45339, 45359, 45383, 45326, 45356, 45318, 45344.
The map draws ZIP code areas only. For the streets inside 45373, 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 45373 compare with the rest of Miami County?
| Measure | 45373 | In Miami County | In OH |
|---|---|---|---|
| People (ACS 2020-2024) | 37,565 | 2nd of 17 | 63rd of 1,233 |
| Median household income | $76k | 7th of 13 | 307th of 755 |
| Median home value | $253k | 4th of 14 | 187th of 810 |
Its median household income is higher than in 56% of U.S. residential ZIP codes, and it is denser than 71% of all 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 45373?
The 2020 Census counted 36,863 people in 45373; the ACS, which samples households over 2020-2024, estimates 37,565. Between the 2010 and 2020 censuses its population grew 4.9% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 37,565
- 2020 Census count
- 36,863+4.9% since 2010 (35,131)
- Households
- 15,229
- Median age
- 39.3
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 45373?
Of the 37,565 people the ACS estimates in 45373, 24.4% are under 18 and 18.4% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (86.0%).
- Under 1824.4%
- 18 to 6457.3%
- 65 and older18.4%
- White, not Hispanic86.0%
- Other or two or more5.2%
- Asian, not Hispanic3.3%
- Hispanic or Latino2.8%
- Black, not Hispanic2.6%
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 45373 earn?
Median household income is $75,742 (ACS 2020-2024), the 7th highest of the 13 ranked ZIP codes in Miami County. It is not measurably different from 2015-2019 ($76,661 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $75,742
- Income per person
- $40,954
- Below the poverty line
- 10.1%
- Unemployed (of the labor force)
- 3.6%
- Adults 25+ with a bachelor's degree
- 35.1%
- Adjusted gross income per tax return, 2022
- $84,38217,860 returns; wages 67% 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 45373?
FHFA's house price index for 45373, built from repeat sales and appraisals of the same homes, rose 92% from 2015 to 2025 and rose 52% from 2020 to 2025, and moved +2.9% in 2025.
- Median home value (owners' estimate)
- $253,400
- Median gross rent
- $988
- Homes owned by their occupants
- 71.3%
- Housing units
- 16,038
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 45373?
862 business establishments had a location in this ZIP code in 2023, 30 more than in 2018; the most are in retail trade (ZIP Code Business Patterns).
- Retail trade121
- Health care and social assistance114
- Other services (except public administration)96
- Accommodation and food services92
- Professional, scientific, and technical services74
- Construction73
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 45373?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 45312 | Casstown | 1,086 | $92k | 5.6 mi |
| 45371 | Tipp City | 22,865 | $94k | 6.6 mi |
| 45339 | Ludlow Falls | 1,057 | $98k | 7.9 mi |
| 45359 | Pleasant Hill | 2,160 | $77k | 8.3 mi |
| 45383 | West Milton | 6,912 | $67k | 9.0 mi |
| 45326 | Fletcher | 1,446 | $94k | 9.1 mi |
| 45356 | Piqua | 25,237 | $69k | 9.1 mi |
| 45318 | Covington | 5,511 | $74k | 10.6 mi |
| 45344 | New Carlisle | 16,979 | $79k | 11.3 mi |
| 45377 | Vandalia | 14,888 | $77k | 9.0 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.
Which other ZIP codes use the name Troy?
1 more ZIP code carries the postal name Troy, OH without a residential delivery area: PO boxes at the post office, or a single organization with its own ZIP code. The Census Bureau publishes no figures for it.
| ZIP | County |
|---|---|
| 45374 | Miami County |
Source: GeoNames postal codes (CC BY 4.0), downloaded 2026-10-09; a ZIP code with no Census ZCTA has no residential delivery area.