Connecticritters.
Gotta post. A person from Wisconsin is emphatically not a Wisconsiner or a shudder Cheesehead. Wisconsiner is just nonsense; Cheesehead is acceptable only if that person is also a Packers fan.
A person from Wisconsin is a Wisconsinite.
And I live in Illinois currently. I don’t hear it used much but Illini is probably OK. Me, (and I’ve joined these flatlander ranks,) I can’t help but call them (and myself) FIBs.
As in F****** Illinois Bastard. A proper term still used in Wisconsin, usually when some smug Chicago jerk came north to vacation in my beautiful home state, and was usually an asshole to the Wisconsinite locals. And yes, I’m a FIB now too, so don’t go crying. I’ve picked up the aggressive driving of my fellow Illini; I hope I’m not too much of a bastard yet. 
Even better - if said FIB brought a boat, they’re a FIBTAB - F****** Illinois Bastard Towing a Boat. And they often do.
Hey, I’m in the same boat as you (so to speak)…Wisconsinite who now lives in Illinois. We definitely called Illinoisians FIBs when I was growing up in Green Bay, as well as SEIPs (Sh*t-Eating Illinois People). 
Such hostility between you COWs (chumps of Wisconsin) and you FIBs! Can’t we all just get along? Us CATCALLs (Cool and tan Californians always loose and laidback) love everybody!
As someone who grew up in Arkansas, I can affirm the official term is Arkansan. Arkansawyer may be archaic, or for the sticks.
I like “Connectizen”.
Only the males; the females are Michigeese. And the children Michigoslings.
I call them Michuganers.
And how is Arkansan pronounced. (Note that Arkansas Ave. in Atlantic City is pronounced ar-KAN-sas–accent on final syllable and final s pronounced.)
Men from Paris are Parisians, and a joke about “parasites” will only be met with a tired glance. But people from Memphis are Memphisites, not Memphisians.
Residents of Naples (“New City” for the Greek colony in Italy) are Neopolitans. In Naples, Florida (thankfully not named “New Naples”) they are also Neopolitans. But to the northwest live Indianapolans and Minneapolans.
A follower of Thomas Jefferson’s political philosophy is a Jeffersonian, and a resident of any place named in his honor is a Jeffersonite. But in South America there are Amazonians.
Note that I am, in fact, a native Californian (born in San Jose). Lived there for all of three months, so I’m not sure that it counts for much.
In my home state, I occasionally made reference to “Indianians.” Although I suppose Hoosiers is technically correct enough.
Not that it matters, I’m thoroughly Illinoisian now (which, despite appearances, maintains a silent S). Coincidentally, it’s also homophonic with ill-annoyin’.