This past week I had the occasion to go up to the Puget Sound Regional Archives in Bellevue, to look for divorce records. The archivist trundled out 4 huge bound books on a book cart, for me to look through. They were the indexes for the civil court cases in King County, Washington, from 1890 to 1900, and 1900 to 1906; two books indexed by the plaintiff's name (the person bringing the lawsuit), and two by the defendant's name.
These cases cover the whole range of civil (not criminal) legislation - everything from divorce (which is what I was looking for) to adoption, naturalizations, medical malpractice, personal injury, and just suing the next-door neighbor because he was noisy after 11pm. These are just the indexes; the actual cases (denoted by the case numbers) are on microfilm, also at the Puget Sound Regional Archives.
And none of these are online.