This data collection is an index to over 2.85 million obituaries in Ohio newspapers from the 1810s to 2013. It has been compiled from various record sources such as newspapers, obituaries, and local government offices. About ninety percent of the content is from newspaper citations and about ten percent from other sources. Some death notices may be lengthy articles, and some may be brief one line announcements. A small number of marriage notices have also been indexed, along with a variety of other sources, mostly from the Hayes Presidential Center. Examples of these other sources are probate case files, funeral home records, society membership records, biographical files, brief references in history books, etc. Information extracted from these documents generally includes name of deceased, death date, place of death (city, state), age at death, birth date, parents’ names, marriage date, spouse name, newspaper source (title, date, page, column), newspaper location, newspaper repository location, other source (title, data, location description).