U.S. States: Virginia: Loudoun County
Loudoun as a county was estabilishe in 1757, being a part of Fairfax Co before that, and Prince William Co before that. The marriage records of many counties did not survive war activity. The records in early Loudoun are "marriage bonds" that have survived, and they begin in 1799.
Some churches, like the Quakers, kept very good family birth and death records, as well as marriages. In fact, the Quaker marriage certificate is signed by all of the guest who attended the wedding ceremony. They begin when the Quaker came in the the 1740 and founded the Fairfax Meeting and then later the Goose Creek Meeting.