These marriage indexes were transcribed by Betty Stillion Shinn. She has spent many 1,000's of hours copying and transcribing Guernsey Co. records to help others find their ancestors.
These particluar records are not on her website but she has graciously allowed me to include them here.

Select the first letter of the Surname you are researching from the list below

To view the Marriage Record Indexes, you will need the Adobe Reader.
If you do not already have it, you can download the latest version here