ZIP code
45321
Eldorado, OH
45321 covers Eldorado in Preble County, with 1,254 people in the ACS 2023 estimate.
Figures are for the Census ZIP Code Tabulation Area (ZCTA), which is not the same as a USPS ZIP code. A PO Box or unique ZIP may have no ZCTA and no demographics. Methodology
U.S. Census Bureau, ACS 2019–2023 5-year (vintage 2023). Geography: ZCTA 45321. Methodology
ZIP code map of 45321

About ZIP code 45321
More enterprise fields
Commercial ZIP directory · not ACS
Commercial ZIP directory population_count for ZCTA 45321. Not ACS. Methodology
People in 45321
Race
- White827
- Asian4
- Other race4
- Two or more races24
Hispanic or Latino (any race): 7
Age
- Under 10106
- 10 to 19116
- 20 to 29104
- 30 to 3984
- 40 to 49111
- 50 to 59116
- 60 to 69107
- 70 to 7968
- 80 and older47
Income and housing in 45321
Education
- High school graduate88.6%
- Bachelor's degree15.2%
- Graduate degree2.6%
Places covering 45321
Cities and places — Population overlap
Share of this ZIP/ZCTA’s population located within each place, based on ZIP Code Database place-overlap data. This is a population measure, not land-area overlap or the Census-place population.
- Eldorado53.3%
ZIP Code Database place-overlap table, field percent_of_zip_population_in_place, keyed by place_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology
Counties — Population overlap
Share of this ZIP/ZCTA’s population located within each county, based on ZIP Code Database county-overlap data. This is a population measure, not land-area overlap or the Census county population.
- Preble County100.0%
ZIP Code Database county-overlap table, field percent_of_zip_population_in_county, keyed by county_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology
46.7% of this ZIP is outside city limits (a real overlap row, not missing data).
Population history for 45321
Hover the chart or read the table below (Year | ACS | IRS).
| Year | ACS population | IRS population |
|---|---|---|
| 2005 | 1,003 | |
| 2006 | 972 | |
| 2007 | 1,027 | |
| 2008 | 922 | |
| 2009 | 893 | |
| 2010 | 868 | |
| 2011 | 1,040 | 877 |
| 2012 | 946 | 850 |
| 2013 | 975 | 850 |
| 2014 | 1,056 | 820 |
| 2015 | 940 | 830 |
| 2016 | 818 | 810 |
| 2017 | 806 | 800 |
| 2018 | 851 | 780 |
| 2019 | 791 | 840 |
| 2020 | 1,018 | 800 |
| 2021 | 1,139 | 800 |
| 2022 | 1,235 | 840 |
| 2023 | 1,254 |
ACS: U.S. Census Bureau American Community Survey 5-year estimates. IRS: Statistics of Income ZIP Code data.
ZIP codes near 45321
12 nearest ZIP centroids (any distance)
- 45347New Paris4.3 miPop 4,029 · Income $68,073
- 45382West Manchester4.7 miPop 1,139 · Income $88,125
- 45338Lewisburg7.6 miPop 4,782 · Income $75,462
- 45320Eaton7.9 miPop 15,402 · Income $68,740
- 45346New Madison8.2 miPop 2,022 · Income $81,076
- 45332Hollansburg10.5 miPop 602 · Income $65,000
- 45378Verona10.9 miPop 459 · Income $72,917
- 47374Richmond11.0 miPop 45,186 · Income $52,566
- 45304Arcanum11.8 miPop 7,624 · Income $72,014
- 47324Boston12.2 miPop 262 · Income $67,734
- 45381West Alexandria12.7 miPop 5,662 · Income $72,772
- 45352Palestine13.1 miPop 177 · Income $63,542
ZIP centroids within 2 miles
No other ZIP codes within 2 miles of 45321, measured by Census internal-point centroids. Try a wider radius.
ZIPs within 2 miles of this place
Default is 2 miles. Distances are between ZIP centroids. Widen the radius if nothing is in range.
ZIP code 45321 FAQ
- What city is ZIP code 45321 in?
- 45321 is in Eldorado, OH.
- What county is 45321 in?
- 45321 is in Preble County.
- What is the median household income in 45321?
- The median household income in 45321 is $67,153.
- Which ZIP codes are near 45321?
- Use the radius tool on this page to list ZIP codes within a chosen distance of 45321.