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County ZIP codes · Ohio · FIPS 39107

Mercer County, OH ZIP Codes

Mercer 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 Mercer County and 6 mainly in a neighboring county; 11 cross the county line. Median household income ranges from $68,409 in 45887 (Spencerville) to $113,967 in 45883 (Saint Henry) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Mercer County?

45310 · Burkettsville: $78k45388 · Yorkshire: $87k45822 · Celina: $70k45826 · Chickasaw: $101k45828 · Coldwater: $73k45846 · Fort Recovery: $92k45860 · Maria Stein: $111k45862 · Mendon: $46k45865 · Minster: $89k45866 · Montezuma: $81k45869 · New Bremen: $88k45882 · Rockford: $75k45883 · Saint Henry: $114k45887 · Spencerville: $68k45894 · Venedocia: $81k45898 · Willshire: $54k4582245846458824588745869458624586545883458984582845894458604538845310 · Burkettsville: $78k45388 · Yorkshire: $87k45822 · Celina: $70k45826 · Chickasaw: $101k45828 · Coldwater: $73k45846 · Fort Recovery: $92k45860 · Maria Stein: $111k45862 · Mendon: $46k45865 · Minster: $89k45866 · Montezuma: $81k45869 · New Bremen: $88k45882 · Rockford: $75k45883 · Saint Henry: $114k45887 · Spencerville: $68k45894 · Venedocia: $81k45898 · Willshire: $54k4582245846458824588745869458624586545883458984582845894458604538845310 · Burkettsville: $78k45388 · Yorkshire: $87k45822 · Celina: $70k45826 · Chickasaw: $101k45828 · Coldwater: $73k45846 · Fort Recovery: $92k45860 · Maria Stein: $111k45862 · Mendon: $46k45865 · Minster: $89k45866 · Montezuma: $81k45869 · New Bremen: $88k45882 · Rockford: $75k45883 · Saint Henry: $114k45887 · Spencerville: $68k45894 · Venedocia: $81k45898 · Willshire: $54k458224584645882458874586945862458654589845828458944586045388
The residential ZIP codes of Mercer 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 $70,200 and $91,736.

They carry 16 postal town names.

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

All 16 residential ZIP codes in Mercer County

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

Residential ZIP codes mainly in Mercer County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
45822 Celina 19,957 122 $70k $183k 100%
45828 Coldwater 6,404 189 $73k $252k 100%
45846 Fort Recovery 4,644 61 $92k $249k 86%
45883 Saint Henry 4,144 114 $114k $297k 97%
45882 Rockford 2,919 34 $75k $162k 94%
45860 Maria Stein 2,326 70 $111k $296k 100%
45862 Mendon 1,417 39 $46k $108k 92%
45826 Chickasaw 394 1,642 $101k $297k 100%
45310 Burkettsville 227 1,312 $78k $207k 72%
45866 Montezuma 117 1,147 $81k $111k 100%

Partly in Mercer County

Residential ZIP codes mainly in another county that reach at least 1% into Mercer County, by their share here
In this county
45898 Willshire 917 31 $54k $141k 34%
45869 New Bremen 4,170 116 $88k $250k 10%
45894 Venedocia 602 18 $81k $183k 3%
45887 Spencerville 4,422 63 $68k $184k 3%
45865 Minster 5,522 156 $89k $286k 2%
45388 Yorkshire 841 48 $87k $325k 2%

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?

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

Share of each ZIP code's land in Mercer County and in the neighboring counties
ZIPIn MercerElsewhere
458652%Auglaize County 60%; Shelby County 38%
4584686%Darke County 14%
458873%Allen County 55%; Auglaize County 24%; Van Wert County 18%
4586910%Auglaize County 77%; Shelby County 13%
4588397%Darke County 3%
4588294%Van Wert County 6%
4586292%Auglaize County 8%
4589834%Van Wert County 66%
453882%Darke County 96%; Shelby County 2%
458943%Van Wert County 97%
4531072%Darke County 28%

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

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Mercer County's ZIP codes use 2 prefixes: 453 and 458.

Three-digit prefixes of Mercer 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 Mercer County's
PrefixSectional centerHereAll codes
453 Dayton, OH (SCF 453) 2 80
458 Columbus, OH (SCF 430) 14 85

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