This document discusses opportunities for including coastal blue carbon ecosystems in Nationally Determined Contributions (NDCs) submitted under the Paris Agreement. It finds that 28 countries currently include references to coastal wetlands in their NDCs' mitigation sections, while 59 include coastal ecosystems in adaptation strategies. There is significant potential to expand consideration of blue carbon mitigation contributions in future NDCs. Protecting and restoring coastal wetlands could increase annual carbon sequestration by 160 million tons of CO2 per year, equivalent to offsetting over 77 million tons of coal burned. Including blue carbon can help countries strengthen their climate commitments in line with the Paris Agreement.