As weddings continue to evolve into more elaborate and extravagant events, the resulting environmental impacts increase as well. The goal of this thesis project is to help wedding venues become more sustainable by developing requirements for a certification administered by an eco-wedding association. After identifying the key areas of impact for wedding venues, the final outcome is a checklist of relevant criteria venues need to meet in order to receive one of three levels of venue sustainability certification and join the eco-wedding association. The combination of the certification and association closes the sustainability gap in modern US weddings, increasing awareness around the social, economic, and environmental benefits gained through this industry transformation.