Couples seeking a divorce in Ohio must file in the county where they have resided for the last 90 days. You or your spouse must have lived in Ohio for at least 6 months.Now comes Plaintiff and states as follows: 1. Plaintiff has been a resident of the State of Ohio for at least six (6) months immediately before filing this. The main form the filing spouse needs is the Complaint for Divorce or Petition for Dissolution of Marriage. To file for a dissolution, you will need to sit down with your spouse to fill out a number of complex forms. With 3StepDivorce TM you can complete and print your Ohio divorce forms (including a marital settlement agreement) instantly. To obtain a dissolution or divorce, you must live in Ohio for at least six months before filing. With 3StepDivorce TM you can complete and print your Ohio divorce forms (including a marital settlement agreement) instantly. Additionally, the filing must occur in the county where the filer resides, providing another layer to the legal prerequisites for divorce.