Yes , you have to be an Oregon resident for 6 months and have lived in the same county for 3 months prior to filing for divorce . If both parties agree to all the terms ( child custody , child support , spousal support & property division ) it's possible you won't need an attorney . If any are , you will need legal representation ( you can ask in your petition for divorce for your spouse to pay your legal fees , which may/may not be granted ) .
-------------------- Never let your sense of morals get in the way of doing what's right. Isaac Asimov