Proper noun
One of 88 counties in Ohio, United States. County seat: Ravenna.
One of 72 counties in Wisconsin, United States. County seat: Stevens Point.
Source: en.wiktionary.orgIn 1848, the southern part of Portage County was renamed Adams County and included all of current-day Adams County and the northern section of Juneau County. Source: Internet
The area from the northern boundary of Columbia County to Lake Superior was removed from Brown County and was then called Portage County. Source: Internet