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County ZIP codes · Ohio · FIPS 39065

Hardin County, OH ZIP Codes

Hardin County, Ohio has 16 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 10 of the residential ones lie mainly in Hardin County and 6 mainly in a neighboring county; 12 cross the county line. Median household income ranges from $44,045 in 45812 (Alger) to $93,893 in 43347 (Rushsylvania) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Hardin County?

43310 · Belle Center: $68k43326 · Kenton: $64k43331 · Lakeview: $61k43332 · La Rue: $81k43340 · Mount Victory: $72k43345 · Ridgeway: $91k43346 · Roundhead: $57k43347 · Rushsylvania: $94k45810 · Ada: $64k45812 · Alger: $44k45835 · Dola: $76k45836 · Dunkirk: $56k45843 · Forest: $72k45850 · Harrod: $85k45859 · McGuffey: $51k45896 · Waynesfield: $62k433264584345850433324331045810433404589645812433314334743345458364583543310 · Belle Center: $68k43326 · Kenton: $64k43331 · Lakeview: $61k43332 · La Rue: $81k43340 · Mount Victory: $72k43345 · Ridgeway: $91k43346 · Roundhead: $57k43347 · Rushsylvania: $94k45810 · Ada: $64k45812 · Alger: $44k45835 · Dola: $76k45836 · Dunkirk: $56k45843 · Forest: $72k45850 · Harrod: $85k45859 · McGuffey: $51k45896 · Waynesfield: $62k433264584345850433324331045810433404589645812433314334743345458364583543310 · Belle Center: $68k43326 · Kenton: $64k43331 · Lakeview: $61k43332 · La Rue: $81k43340 · Mount Victory: $72k43345 · Ridgeway: $91k43346 · Roundhead: $57k43347 · Rushsylvania: $94k45810 · Ada: $64k45812 · Alger: $44k45835 · Dola: $76k45836 · Dunkirk: $56k45843 · Forest: $72k45850 · Harrod: $85k45859 · McGuffey: $51k45896 · Waynesfield: $62k433264584345850433324331045810433404589645812433314334743345
The residential ZIP codes of Hardin County (whole outlines, including the parts in neighboring counties), shaded by median household income in national fifths (ACS 2020-2024). <$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

How different are its ZIP codes?

The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $60,980 and $68,388.

They carry 16 postal town names.

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).

All 16 residential ZIP codes in Hardin County

10 ZIP codes lie mainly in Hardin County; 6 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Hardin County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
43326 Kenton 12,573 67 $64k $153k 99%
45810 Ada 7,449 114 $64k $168k 80%
45843 Forest 4,184 42 $72k $176k 38%
43310 Belle Center 3,177 48 $68k $163k 55%
43340 Mount Victory 2,103 43 $72k $193k 80%
45812 Alger 2,027 52 $44k $137k 98%
45836 Dunkirk 1,573 64 $56k $120k 96%
45835 Dola 449 24 $76k $98k 100%
45859 McGuffey 384 1,100 $51k $78k 100%
43346 Roundhead 238 222 $57k – 100%

Partly in Hardin County

Residential ZIP codes mainly in another county that reach at least 1% into Hardin County, by their share here
In this county
43345 Ridgeway 666 23 $91k $202k 47%
45850 Harrod 3,559 61 $85k $194k 15%
45896 Waynesfield 1,833 50 $62k $173k 13%
43347 Rushsylvania 1,113 36 $94k $158k 10%
43332 La Rue 2,173 36 $81k $147k 9%
43331 Lakeview 4,106 133 $61k $145k 6%

Download the 16 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).

Which ZIP codes cross the county line?

13 ZIP codes of Hardin County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Hardin County and in the neighboring counties
ZIPIn HardinElsewhere
4332699%
4581080%Hancock County 12%; Allen County 8%
4584338%Wyandot County 37%; Hancock County 25%
433316%Logan County 65%; Auglaize County 29%
4585015%Allen County 81%; Auglaize County 4%
4331055%Logan County 45%
433329%Marion County 87%; Wyandot County 4%
4334080%Union County 20%
4581298%Allen County 2%
4589613%Auglaize County 81%; Allen County 6%
4583696%Hancock County 4%
4334710%Logan County 90%
4334547%Logan County 53%

Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).

Which first three digits do Hardin County's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Hardin County's ZIP codes use 2 prefixes: 433 and 458.

Three-digit prefixes of Hardin County's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are Hardin County's
PrefixSectional centerHereAll codes
433 Columbus, OH (SCF 430) 8 43
458 Columbus, OH (SCF 430) 8 85

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.