The rise in human population and the growing climate change concerns necessitate the production of significant amounts of renewable fuels. The peel of oranges, a residue of orange juice production, has recently been considered as a feedstock for biofuel production. Oranges are commonly available, and their peels are usually thrown away as waste. Biodiesel production using orange peels provides an answer for converting organic waste into a renewable energy source. Previously, a student project at Kettering University aimed to produce biodiesel fuel using orange peels and achieved limited success. This article reports the results of a student research project the objectives of which were to research, produce, and analyze orange zest biodiesel and measure its chemical and thermal properties. Through steam distillation and transesterification, 6.464 g of biodiesel, primarily D-limonene, was produced using the zest of 31 oranges. The measured heat of combustion of the biodiesel was 42.2 MJ/kg.