This study evaluated the environmental, social, economic and technical dimensions of sustainability of black soldier fly (Hermetiaillucens) larvae (BSFL) using expert opinion in Port Harcourt. Rivers State. Using questionnaire to elicit responses from agricultural practitioners, academia and regulators. The environmental sustainability index was 59.02% with utilization of different waste as the most influencing attributes (9.11%) of this dimension. The social sustainability however was 42.86% with potential for job creation as most influencing attribute with 10.71%. Economic sustainability recorded an index of 47.77% with efficiency of produced raw materials (8.04%) as most influencing attribute. Technical sustainability on the other hand recorded an index of 46.43% of which technical improvement represents 12.5% of the attributes. Overall, the sustainability index of BSFL in Port Harcourt, Rivers State Nigeria was 38.39%. This index value is low owning to the fact that small-scale cultivation of the larvae in Rivers State. It is recommended further awareness training by international organisation in collaboration with Animal Science Association of Nigeria, fisheries and aquaculture institutions and other agricultural institution can go along way to improve on sustainability of BSFL in Nigeria.