Your local police can assist you.
By California law it is illegal to have any airsoft guns other than ones that are clear or neon colored out in public. Over in Pleasanton it is illegal to shoot an airsoft gun (or any type of gun that shoots any type of projectile for that matter). In Dublin, minors are not allowed to posses or discharge airsoft guns unless given permission from their parents, but no one is allowed to have or shoot an airsoft gun in a public park. Otherwise ownership should be legal (consult your local law enforcement for a correct and current answer, I cannot be held responsible if anyone breaks the law because of this answer)
yes airsoft guns are legal in OHIO
Yes, airsoft guns are legal in Canada.
Usually airsoft guns aren't allowed in public places
Yes
Yes
Yes
Yes they are.
Yes, they are.
Yes, i'm 14 and i own 4 airsoft guns.. As long as its on your property and not like in a city
18 in the USA
Yes, they're legal in all states.
I don't know about Canadian airsoft stores, but I know that most airsoft in North America sell Canadian-legal airsoft guns.