Yes, indeed all governments in the [corporate] US are Corporations. Even the Federal Government is a federal corporation, and is stated as such in
28 USC §3002 (15)(A)
The State and municipal governments you have referenced fall under Sub paragraphs (B) and (C) of the above definition. In this thread
:Supreme Court rules in favor of Obamacare in King v. Burwell
, I allude to how 'State of ______' corporations are instrumentalities of the Federal Government, and why barring any general applicability of
statute through publication of implementing regulations in the federal register, many of the "Laws of the Land" do not apply to states of the Union
and the non-citizen nationals who reside there.
OP, you alluded to the idea that if you are not part of the 'corporation' then you cannot be bound by their policy [Statute]. This too is correct for
the most part within civil statutory law, criminal law is another matter and is generally applicable... It boils down to 'status', simply, one's civil
statutory status. That voluntary declaration, that everyone gets so patriotic about: "I am a(n) 'US Citizen'!" Almost everyone hears that term and
they gratifyingly think of the 14th amendment to our constitution... and, they would be wrong.
There are two distinct and mutually exclusive contexts of law; the constitutional context and the statutory context. It is because of this dichotomy
that men and women check the 'US Citizen' box of government forms, they believe it is the 'citizen' enumerated in the constitution. But, as we will
see a statutory 'US Citizen' cannot be and is not the same as a constitutional 'citizen'.
So, what is a 'US Citizen'? This term is found in title 8 USC. 8 USC §1401
Now, we have seen that the 'United States' IS a federal corporation... by simple logic on can presume that in this particular case a 'US Citizen' IS a
federal 'employee'. What other legal connotations go with 'United States'?
We see in title 26 USC that the 'United States' "when used in a geographical sense includes only the States and the District of Columbia." Seems
straight forward, but lets take a look at the definition for 'State' right below it. We see that the term 'State' ONLY includes the District of
Columbia, and NOT any of the states of the Union. What these definitions illustrate is extremely important to realize and understand that what is
written in statute must be interpreted as it is written. The legal maxim applicable here is "Expressio unius est exclusio alterius" or "the expression
of one thing is the exclusion of another. [Blacks Law Dictionary, 6th Edition, Page 581.]
26 USC §7701
Rules of Statutory Construction
Codified Cannons and the Common Law of Interpretation
So, where does this leave us? Currently, we have some inkling that a 'US Citizen' is a federal employee, and the 'United States' only includes the
District of Columbia, and that DC is a 'State'.
Still with me? Okay. Where else is 'State' Defined or the definition expanded? We see in 4 USC
that the term “State” includes any Territory or possession of the United States. Good, so we have expanded what a 'State' is, but
have yet to see it be defined to include ANY state of the Union.
A good starting place in understanding why, states of the Union are very very rarely listed in statute is to read the definition of 'Foreign States'
in Blacks Law dictionary. In the 6th Edition it is on page 648. States of the Union are not 'Territory' as referenced above, they are independent and
sovereign states. We can see this in the 86 Corpus Juris Secundum legal encyclopedia, territories. Likewise states of the Union retain their status as
independent and foreign nations with respect to the federal government EXCEPT in matters of external affairs as delegated to them by the federal
government [corporate capacity]. Reference Bank of Agusta v. Earle, 38 U.S. (13 Pet.) 519; 10 L.Ed. 274 (1839) and People ex re. Atty. Gen. V. NAglee,
1 Cal. 234 (1850).
But, how does this tie into the constitution? Well, the 14th amendment identifies one as a 'citizen of the United States'. HOWEVER, the 'United
States' in the constitution is the nation that is the 'United States of America' made up of the states of the Union and Excludes federal territory and
possessions and instrumentalities. We can see this in the following:
"The term "United States" may be used in any one of several senses.  It may be merely the name of a sovereign* occupying the position analogous to
that of other sovereigns in the family of nations.  It may designate the territory over which the sovereignty of the United States extends, or 
it may be the collective name of the states which are united by and under the Constitution."
[Hooven & Allison Co. v. Evatt, 324 U.S. 652 (1945)]
In these [legal?] 'senses' we can reasonable deduce that territory and states [of the Union] are distinct and exclusive as are the associated 'United
States' ... i.e. the Corporation has territory [called the Federal Zone], the Nation has independent sovereign states. AND most importantly, that
constitutional and statutory contexts are also separate.
Whew, a lot to chew on, and we haven't even scratched the surface yet.