 The study investigates the characterization of different biomass from Washingtonia plant, including leaf stalk, WLS, trunk core, WTC, and trunk spine, WTS, fibers, through scanning electron microscopy, SEM, chemical and elemental composition analysis, x-ray diffraction, XRD, analysis, and thermogravimetry, TGA, analysis. The results show that WTS fiber has the highest crystallinity and thermal stability properties, while WLS fiber has the lowest crystallinity and thermal stability properties. All fibers possess great thermal resistance with tonset in the range of 307.4 to 328.1 degrees Celsius and peak in the range of 352.4 to 347.9 degrees Celsius, indicating their potential to be applied as a biomaterial for versatile applications in the future. This article was authored by Mohamed Jawaid, Laokia Kean, H. Fawad, and others.