Residential delivery area · Ohio
ZIP Code 45039: Maineville, OH
ZIP code 45039 uses the postal name Maineville, Ohio and lies entirely in Warren County (Census 2020 ZIP-county file). About 28,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $108,794 (Census Bureau, ACS 2020-2024). By Census place, 11% of its land lies in Landen (a census-designated place), and 9% in smaller places; 80% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Maineville · its only residential ZIP
- County
- Warren County
- Census places
- Landen census-designated place
- Metro area
- Cincinnati, OH-KY-IN
- House district
- OH-1 119th Congress
- State
- Ohio
- Time zone
- Eastern
- Land area
- 15.6 sq mi · 1,820 people per sq mi
Where is ZIP code 45039?
45039 centers on 39.327°, -84.237° and covers 15.6 square miles of land plus 0.4 of water. It borders 6 ZIP codes: 45034, 45065, 45040, 45140, 45152, 45036.
The map draws ZIP code areas only. For the streets inside 45039, 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 45039 compare with the rest of Warren County?
| Measure | 45039 | In Warren County | In OH |
|---|---|---|---|
| People (ACS 2020-2024) | 28,335 | 8th of 21 | 116th of 1,233 |
| Median household income | $109k | 6th of 17 | 57th of 755 |
| Median home value | $327k | 9th of 18 | 81st of 810 |
Its median household income is higher than in 86% of U.S. residential ZIP codes, and it is denser than 84% 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 45039?
The 2020 Census counted 27,529 people in 45039; the ACS, which samples households over 2020-2024, estimates 28,335. Between the 2010 and 2020 censuses its population grew 20.7% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 28,335
- 2020 Census count
- 27,529+20.7% since 2010 (22,814)
- Households
- 10,945
- Median age
- 39.5
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 45039?
Of the 28,335 people the ACS estimates in 45039, 23.9% are under 18 and 17.2% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (85.1%).
- Under 1823.9%
- 18 to 6459.0%
- 65 and older17.2%
- White, not Hispanic85.1%
- Hispanic or Latino4.8%
- Asian, not Hispanic4.4%
- Other or two or more2.9%
- Black, not Hispanic2.7%
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 45039 earn?
Median household income is $108,794 (ACS 2020-2024), the 6th highest of the 17 ranked ZIP codes in Warren County. It is not measurably different from 2015-2019 ($121,883 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $108,794
- Income per person
- $50,383
- Below the poverty line
- 4.1%
- Unemployed (of the labor force)
- 1.3%
- Adults 25+ with a bachelor's degree
- 51.6%
- Adjusted gross income per tax return, 2022
- $104,32914,420 returns; wages 72% 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 45039?
FHFA's house price index for 45039, built from repeat sales and appraisals of the same homes, rose 96% from 2015 to 2025 and rose 57% from 2020 to 2025, and moved +7.3% in 2025.
- Median home value (owners' estimate)
- $327,200
- Median gross rent
- $1,677
- Homes owned by their occupants
- 83.8%
- Housing units
- 11,401
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 45039?
360 business establishments had a location in this ZIP code in 2023, 40 more than in 2018; the most are in professional, scientific, and technical services (ZIP Code Business Patterns).
- Professional, scientific, and technical services44
- Health care and social assistance42
- Other services (except public administration)41
- Construction40
- Retail trade36
- Accommodation and food services30
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 45039?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 45034 | Kings Mills | 968 | $152k | 2.1 mi |
| 45065 | South Lebanon | 7,053 | $105k | 3.2 mi |
| 45040 | Mason | 59,518 | $133k | 4.4 mi |
| 45140 | Loveland | 57,211 | $115k | 5.1 mi |
| 45152 | Morrow | 14,850 | $123k | 6.4 mi |
| 45036 | Lebanon | 42,204 | $99k | 8.1 mi |
| 45249 | Cincinnati | 14,490 | $106k | 6.0 mi (near) |
| 45242 | Cincinnati | 22,623 | $125k | 8.5 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.