{{Short description|Unincorporated community in Ohio, U.S.}} {{Use American English|date=July 2025}} {{Use mdy dates|date=July 2023}} {{Infobox settlement | name = Decatur, Ohio | settlement_type = Unincorporated community | image_map = OHMap-doton-Decatur.png | map_caption = Location of Decatur, Ohio | subdivision_type = Country | subdivision_name = United States | subdivision_type1 = State | subdivision_name1 = Ohio | subdivision_type2 = County | subdivision_name2 = Brown | subdivision_type3 = Township | subdivision_name3 = Byrd | coordinates = {{coord|38|48|56|N|83|42|14|W|display=inline}} | postal_code_type = ZIP code | postal_code = 45115 }}
'''Decatur''' is an unincorporated community in eastern Byrd Township, Brown County, Ohio, United States.<ref name=gnis>{{GNIS|1064517}}</ref> It has a post office with the ZIP code 45115.<ref>[https://tools.usps.com/zip-code-lookup.htm?citybyzipcode USPS – Cities by ZIP Code]</ref> It is located along State Route 125, an east-west highway.
Decatur was originally called St. Clairsville, and under the latter name was laid out around 1802.<ref>{{cite book | url=https://archive.org/details/bub_gb_udUyAQAAMAAJ | title=The History of Brown County, Ohio | publisher=Higginson Book Company | year=1883 | pages=[https://archive.org/details/bub_gb_udUyAQAAMAAJ/page/n660 702]}}</ref> A post office called Decatur has been in operation since 1817.<ref>{{cite web|url=http://www.postalhistory.com/postoffices.asp?task=display&state=OH&county=Brown |title=Brown County |publisher=Jim Forte Postal History |accessdate=17 December 2015 |url-status=dead |archiveurl=https://web.archive.org/web/20151222110747/http://www.postalhistory.com/postoffices.asp?task=display&state=OH&county=Brown |archivedate=22 December 2015 }}</ref>
==Gallery== <gallery> File:DecaturOH1.JPG|Decatur community sign File:DecaturOH2.JPG|Looking west on Ohio Highway 125 in Decatur </gallery>
==References== <references/>
{{Brown County, Ohio}}
{{coord|38|48|56|N|83|42|14|W|type:city_region:US-OH_source:GNIS-enwiki|display=title}}
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Category:Unincorporated communities in Ohio Category:Unincorporated communities in Brown County, Ohio Category:1802 establishments in the Northwest Territory
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