Tag:place=county

place = 
Description
A county - a geographical region of a country. Show/edit corresponding data item.
Group: places
Used on these elements
may be used on nodesshould not be used on waysshould not be used on areasshould not be used on relations (except multipolygon relations)
Useful combination
See also
Status: in use

A county is a geographical region of a country used for administrative or other purposes, in certain modern nations. In most of the countries that have counties, a county is an administrative subdivision of a larger administrative area and does not necessarily correspond to a populated place. Therefore, the placement of a place= node is arbitrary, conventionally at the centroid of the boundary. Alternatively, you can tag the boundary relation with border_type=county (or a more specific value).