The salt marsh ecosystem plays an integral role in the global carbon budget and can act as a significant carbon sink. However, emissions of carbon dioxide (CO2), nitrous oxide (N2O) and methane (CH4) have the potential to reduce their sink capacity. This study examines Georgia salt marshes on Jekyll and Sapelo Islands to understand zonation patterns and seasonal variability on greenhouse gas (GHG) flux and to put these in the context of the total carbon budget. I found that CO2 and CH4 flux rates vary significantly by vegetation type and season, with the highest rates in tall Spartina areas during June. N2O emissions were negligible from the marsh. Even considering these GHG fluxes, salt marshes behave as strong sinks of carbon. My research suggests that vegetation type can be used as a proxy for scaling GHG emissions to larger spatial scales, which can inform the creation of blue carbon markets that shift economic favor toward conservation of coastal wetlands.