Residential delivery area · Ohio
ZIP Code 45304: Arcanum, OH
ZIP code 45304 uses the postal name Arcanum, Ohio and lies mostly in Darke County (98% of its land) with the rest in Preble County (Census 2020 ZIP-county file). About 7,600 people live there (Census Bureau, ACS 2020-2024). Median household income is $78,125 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Arcanum (2%), Gordon (under 1%), Castine (under 1%) and Ithaca (0%); 98% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Arcanum · its only residential ZIP
- County
- Darke County (98%); Preble County (2%)
- Census places
- Arcanum (2%); Gordon (under 1%); Castine (under 1%); Ithaca (0%)
- Micro area
- Greenville, OH
- House district
- OH-8 119th Congress
- State
- Ohio
- Time zone
- Eastern
- Land area
- 85.2 sq mi · 89 people per sq mi
Where is ZIP code 45304?
45304 centers on 39.981°, -84.525° and covers 85.2 square miles of land plus 0.1 of water. It borders 9 ZIP codes: 45358, 45337, 45378, 45382, 45338, 45346, 45331, 45308, 45309.
The map draws ZIP code areas only. For the streets inside 45304, 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 45304 compare with the rest of Darke County?
| Measure | 45304 | In Darke County | In OH |
|---|---|---|---|
| People (ACS 2020-2024) | 7,599 | 3rd of 23 | 435th of 1,233 |
| Median household income | $78k | 6th of 14 | 278th of 755 |
| Median home value | $190k | 7th of 13 | 421st of 810 |
Its median household income is higher than in 59% of U.S. residential ZIP codes, and it is denser than 52% 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 45304?
The 2020 Census counted 7,532 people in 45304; the ACS, which samples households over 2020-2024, estimates 7,599. Between the 2010 and 2020 censuses its population grew 3.2% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 7,599
- 2020 Census count
- 7,532+3.2% since 2010 (7,300)
- Households
- 2,890
- Median age
- 38.5
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 45304?
Of the 7,599 people the ACS estimates in 45304, 26.7% are under 18 and 17.4% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (95.2%).
- Under 1826.7%
- 18 to 6455.9%
- 65 and older17.4%
- White, not Hispanic95.2%
- Other or two or more2.4%
- Black, not Hispanic1.1%
- Asian, not Hispanic0.8%
- Hispanic or Latino0.3%
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 45304 earn?
Median household income is $78,125 (ACS 2020-2024), the 6th highest of the 14 ranked ZIP codes in Darke County. It is not measurably different from 2015-2019 ($87,951 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $78,125±$7,885
- Income per person
- $33,845
- Below the poverty line
- 8.4%
- Unemployed (of the labor force)
- 1.9%
- Adults 25+ with a bachelor's degree
- 17.2%
- Adjusted gross income per tax return, 2022
- $68,0713,550 returns; wages 69% 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 45304?
FHFA's house price index for 45304, built from repeat sales and appraisals of the same homes, rose 74% from 2015 to 2025 and rose 53% from 2020 to 2025, and moved +10.2% in 2025.
- Median home value (owners' estimate)
- $190,200
- Median gross rent
- $827
- Homes owned by their occupants
- 82.4%
- Housing units
- 2,955
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 45304?
124 business establishments had a location in this ZIP code in 2023, the same count as in 2018; the most are in construction (ZIP Code Business Patterns).
- Construction35
- Other services (except public administration)18
- Retail trade13
- Transportation and warehousing13
- Administrative and support and waste management and remediation services7
- Professional, scientific, and technical services6
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 45304?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 45358 | Pitsburg | 362 | $61k | 2.0 mi |
| 45337 | Laura | 1,703 | $108k | 5.4 mi |
| 45378 | Verona | 539 | $73k | 5.8 mi |
| 45382 | West Manchester | 1,154 | $96k | 7.2 mi |
| 45338 | Lewisburg | 4,761 | $75k | 9.1 mi |
| 45346 | New Madison | 1,663 | $77k | 9.8 mi |
| 45331 | Greenville | 22,356 | $54k | 10.5 mi |
| 45308 | Bradford | 4,385 | $70k | 10.8 mi |
| 45309 | Brookville | 11,876 | $75k | 11.2 mi |
| 45361 | Potsdam | 253 | $66k | 6.0 mi (near) |
| 45354 | Phillipsburg | 553 | $67k | 8.3 mi (near) |
| 45328 | Gettysburg | 544 | $63k | 9.4 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.