Okla. Stat. tit. 58, § 58-942: Petition for letters - Venue

Petition for letters - A petition for letters testamentary or

letters of administration may be filed by any relative, creditor or

other person interested in the estate of said absent person:

1st: In the county in which said absent person was a resident at

the time of his disappearance.

2nd: In the county in which said absent person did, at the time

of his disappearance, have property, either real or personal.