Im from Louisiana originally and we have tons of squirrels and a very open season for them.
Here, I dont know other than you cant shoot Western Greys or another species I cant remember but Fox Squirrels and Eastern Greys (Including the black melanated ones) are fair game.
I live in Lynden. Any place around here I can take my .22 and teach my son the basics of hunting by popping some squirrels (they make a darn good gumbo too.)?