HARRISON COUNTY
County seat: Cadiz
The courthouse is at 100 West Market St. in Cadiz. It houses the Harrison County Court of Common Pleas and its probate and juvenile divisions, as well as the Harrison County Municipal Court.
Court of common pleas
County courts
Free civil legal help
Which legal aid program covers an address in Harrison County is answered by Alliance of Ohio Legal Aids, in the directory with the other statewide offices.
Read off Supreme Court of Ohio, Find Ohio Trial Courts & Local Rules and Supreme Court of Ohio, Ohio Courthouses on 13 October 2026. A list, not a referral: which court hears a case is set by statute and by each court’s own rules.