The Indiana Genealogical Society has added a free database of a Blackford County marriage index to the County Records section of our Members Only area:
--Index to Marriages for Blackford County, Indiana (1839-1857)
This database is free to the public - no membership is needed in order to view it.
The Indiana Genealogical Society now has 778 databases in the Members Only area. They cover all 92 Indiana counties and encompass 500,000+ records.