The Pacific Islands region is facing a high burden of diet-related non-communicable diseases, with Tonga experiencing some of the world's highest rates of type II diabetes and obesity(1). Tonga relies strongly on agriculture as a main source of food production, however in recent decades a nutrition transition has significantly altered Tonga’s food environment(1). Homestead gardens (also known as community gardens) provide an opportunity to stabilise Tongan food production and encourage consumption of fruits and vegetables through increasing access and availability and promoting social values associated with food and eating through community engagement. Although research shows that homestead gardens promote health(2), there is little known about the outcomes in Tonga and the broader Pacific region. Thus, the aim of this study was to explore the dietary diversity of Tongan adults participating in homestead gardening. In October 2024, Tongan adults participating in a homestead gardening initiative (n = 363) across the four main Tongan islands: Tongatapu, ‘Eua, Ha’apai, and Vava’u were surveyed. The survey asked about food and beverage consumption in the previous day to measure dietary diversity (using the Minimum Dietary Diversity for Women indicator), involvement in the homestead garden and general food literacy. Dietary diversity, recognised by a score of 5 or higher, was achieved by 79% of participants. The most consumed food group was meat/poultry/fish (99.4%) and the least consumed was nuts/seeds (4.6%). No statistical significance was found between dietary diversity and garden location by island (p = 0.196), however there was an effect between district location (p < 0.001). The findings pinpointed specific districts that have lower dietary diversity and vegetable intake. The results also identified a negative significant association between diversity and garden participation length (r = -0.112) and nutrient composition knowledge for crops containing iron (r = -0.22, p < 0.01) and vitamin C (r = -0.147, p = 0.005). Based on these results, recommendations for further research have been made. This work presents new dietary intake data for a Tongan population and highlights the role that homestead gardening can play in supporting healthy, diverse diets.