The GGGI and OECS Commission have collaborated to improve GGGI’s existing Green Growth Index framework by strengthening the interlinkages for blue economy indicators. The result of the collaboration was development of a Green-Blue Growth Index that can be used to measure country performance in the OECS region, which includes eleven Member States – Anguilla, Antigua and Barbuda, British Virgin Islands, the Commonwealth of Dominica, Grenada, Guadeloupe, Martinique, Montserrat, Saint Kitts and Nevis, Saint Lucia, and Saint Vincent and the Grenadines. This report outlines the current Green-Blue Growth Index framework and provides recommendations on suitable blue economy indicators for the Green-Blue Growth Index. In this report, the framework was applied globally but excluded landlocked countries where marine resources do not play an important role. The global application allowed the assessment of OECS performance in green-blue growth relative to other subregions. The report provides the groundwork for further developing the green-blue growth framework, improving data gaps for green and blue economy indicators, and applying the index to other OECS Member States in upcoming years.