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County ZIP codes · Ohio · FIPS 39165

Warren County, OH ZIP Codes

Warren County, Ohio has 21 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 12 of the residential ones lie mainly in Warren County and 9 mainly in a neighboring county; 12 cross the county line. Median household income ranges from $71,510 in 45107 (Blanchester) to $133,240 in 45040 (Mason) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Warren County?

45005 · Franklin: $75k45032 · Harveysburg: $67k45034 · Kings Mills: $152k45036 · Lebanon: $99k45039 · Maineville: $109k45040 · Mason: $133k45044 · Middletown: $74k45050 · Monroe: $104k45054 · Oregonia: $100k45065 · South Lebanon: $105k45066 · Springboro: $131k45068 · Waynesville: $96k45107 · Blanchester: $72k45113 · Clarksville: $105k45122 · Goshen: $83k45140 · Loveland: $115k45152 · Morrow: $123k45162 · Pleasant Plain: $85k45249 · Cincinnati: $106k45342 · Miamisburg: $85k45458 · Dayton: $110k45107450364506845122451524514045113450544504445342450054516245040450664503945458452494506545005 · Franklin: $75k45032 · Harveysburg: $67k45034 · Kings Mills: $152k45036 · Lebanon: $99k45039 · Maineville: $109k45040 · Mason: $133k45044 · Middletown: $74k45050 · Monroe: $104k45054 · Oregonia: $100k45065 · South Lebanon: $105k45066 · Springboro: $131k45068 · Waynesville: $96k45107 · Blanchester: $72k45113 · Clarksville: $105k45122 · Goshen: $83k45140 · Loveland: $115k45152 · Morrow: $123k45162 · Pleasant Plain: $85k45249 · Cincinnati: $106k45342 · Miamisburg: $85k45458 · Dayton: $110k45107450364506845122451524514045113450544504445342450054516245040450664503945458452494506545005 · Franklin: $75k45032 · Harveysburg: $67k45034 · Kings Mills: $152k45036 · Lebanon: $99k45039 · Maineville: $109k45040 · Mason: $133k45044 · Middletown: $74k45050 · Monroe: $104k45054 · Oregonia: $100k45065 · South Lebanon: $105k45066 · Springboro: $131k45068 · Waynesville: $96k45107 · Blanchester: $72k45113 · Clarksville: $105k45122 · Goshen: $83k45140 · Loveland: $115k45152 · Morrow: $123k45162 · Pleasant Plain: $85k45249 · Cincinnati: $106k45342 · Miamisburg: $85k45458 · Dayton: $110k451074503645068451224515245140451134505445044453424500545162450404506645458
The residential ZIP codes of Warren 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 $84,722 and $110,150.

They carry 21 postal town names.

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

All 21 residential ZIP codes in Warren County

12 ZIP codes lie mainly in Warren County; 9 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Warren County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
45040 Mason 59,518 2,092 $133k $440k 100%
45036 Lebanon 42,204 520 $99k $352k 100%
45005 Franklin 32,251 880 $75k $219k 99%
45039 Maineville 28,335 1,820 $109k $327k 100%
45066 Springboro 27,545 1,350 $131k $394k 99%
45152 Morrow 14,850 305 $123k $352k 100%
45068 Waynesville 11,597 164 $96k $336k 88%
45065 South Lebanon 7,053 2,400 $105k $312k 100%
45162 Pleasant Plain 2,754 115 $85k $217k 65%
45054 Oregonia 2,693 87 $100k $296k 100%
45034 Kings Mills 968 1,299 $152k $324k 100%
45032 Harveysburg 683 1,882 $67k $164k 100%

Partly in Warren County

Residential ZIP codes mainly in another county that reach at least 1% into Warren County, by their share here
In this county
45113 Clarksville 3,877 103 $105k $280k 42%
45140 Loveland 57,211 1,298 $115k $360k 31%
45107 Blanchester 9,190 114 $72k $221k 19%
45050 Monroe 12,248 1,453 $104k $293k 17%
45458 Dayton 38,712 1,948 $110k $363k 16%
45122 Goshen 10,977 260 $83k $222k 10%
45044 Middletown 56,217 1,488 $74k $242k 8%
45249 Cincinnati 14,490 2,130 $106k $495k 8%
45342 Miamisburg 36,152 1,054 $85k $230k 2%

Download the 21 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 Warren County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Warren County and in the neighboring counties
ZIPIn WarrenElsewhere
4514031%Clermont County 53%; Hamilton County 15%
450448%Butler County 92%
4545816%Montgomery County 82%; Greene County 2%
453422%Montgomery County 98%
4500599%
4506699%Montgomery County 1%
452498%Hamilton County 92%
4505017%Butler County 83%
4506888%Greene County 10%; Clinton County 2%
4512210%Clermont County 90%
4510719%Clinton County 52%; Brown County 18%; Clermont County 11%
4511342%Clinton County 58%
4516265%Clermont County 35%

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

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Warren County's ZIP codes use 5 prefixes: 450, 451, 452, 453 and 454.

Three-digit prefixes of Warren 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 Warren County's
PrefixSectional centerHereAll codes
450 Cincinnati, OH (SCF 450) 12 39
451 Cincinnati, OH (SCF 450) 6 49
452 Cincinnati, OH (SCF 450) 1 70
453 Dayton, OH (SCF 453) 1 80
454 Dayton, OH (SCF 453) 1 43

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