Polyurethane (PU) based algae biocomposite is synthesized, characterized and tested for boron removal from oil produced water (OPW). The percentage of algae is varied in the biocomposite and its physical and chemical properties are evaluated. The surface morphology, crystalline structure, thermal stability is characterized using scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FITR) and thermal gravimetric analysis (TGA). The density of synthesized PU/algae composites is in the range of 1.12 and 1.20 g/mL based on content of filler in the PU matrix. Weight losses of the tested specimens in various chemical solutions are less than 10%. The boron removal efficiency is in the range of 84 to 85%, depending upon the algae filler at pH 7.19.