Okla. Stat. tit. 12, § 12-1752B: Venue of actions arising upon contract

The venue of civil actions instituted under small claims

procedure for the collection of an open account or for the

collection of any note or other instrument of indebtedness shall be,

at the option of the plaintiff or plaintiffs in either of the

following:

(a) in any county in which venue may be properly had as provided

by law; or

(b) in the county in which the debt was contracted or in which

the note or other instrument of indebtedness was given.