Are states a corporation?

[rottweiler]

MILWAUKEE COUNTY BOARD OF SUPERVISORS is not registered as a public corporation with the Secretary of States Office but they are listed by Dunn and Bradstreet.

I called the SoS and talked to someone from Division of Corporate and they told me "MILWAUKEE COUNTY is not a corporation" which is not true. I also have a "no record found" certificate of status from the SoS.

Now there is somebody called the Board of Supervisors running things and they are not registered in Wisconsin either.

Here are the Session Laws from Congress when Wisconsin was a still a territory.

"County Commissioners

Session Laws Chap. 7
Dec. 20, 1837

Sec. 1. That there shall be and hereby is organized in each county in this territory, a board of county commissioners for transacting county business, to consist of three qualified electors, any two of whom shall be competent to do business, to be electd by the qualified electors of the several counties respectively. The first election shall take place on the first Monday in March next; and thereafter, the election shall be at the time and places of the general election of each county.

Their Powers and Duties:

Sec. 4. The County Commissioners thus elected and qualified shall be considered a body corporate and politic, by and under the name and style of "the board of commissioners of the county of"(naming the county.) and as such, by and under such name and style, may sue and be sued, plead and be impleaded, defend and be defended, answer and and be answered unto any court, either in law or equity, and do and transact all business on behalf of their respective counties that may be assigned them by time to time by law,............"