A map of Ohio’s counties with each county labeled by its county route marker design. Counties that don’t prominently signpost county route shields are grayed out. The base map is <a href="//commons.wikimedia.org/wiki/File:Ohio_Counties_Labeled_White.svg" title="File:Ohio Counties Labeled White.svg">File:Ohio Counties Labeled White.svg</a>, and the shields are a compilation of various representative images in <a href="//commons.wikimedia.org/wiki/Category:Diagrams_of_Ohio_county_route_markers" title="Category:Diagrams of Ohio county route markers">Category:Diagrams of Ohio county route markers</a> and its subcategories.
<a href="//commons.wikimedia.org/wiki/User:Mxn" title="User:Mxn">Minh Nguyen</a>
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>