Not since the early '90s, at least, which would've been when I first looked it up. There might've been local ordinances on blade length, but there was nothing in the statutes. Getting caught carrying a switchblade or "dirk knife" was a felony, but there weren't any statutory blade length restrictions.I don't know if it's still in effect, pretty sure it's not but Okla had a blade length limit at one time. I think it was 5 or 6".