<p>The increasing global awareness and growing emphasis on environmental sustainability have fueled the demand for biodegradable materials. In the quest for achieving sustainability, synthetic fibers are proactively being replaced by natural fibers. Fibers derived from plant sources have become increasingly popular and are preferred over synthetic fibers as they are environment-friendly, have low density, and cost less. Though commercial fibers like bamboo, hemp, sisal, kenaf, and coir are used in the composite preparation industries, researchers have focused efforts on identifying new fibers to ensure continuous and adequate supply. In recent times, fibers have been derived from many parts of the tree such as bark, leaf, stem, root, fruit, etc., which are mostly short fibers as compared to the commercial long fibers like sisal, banana, hemp, etc. Among many tree parts, the bark is obtained as a by-product from garden waste, wood production, and forest maintenance; it is preferred due to the advantage of cleaner fiber production. Bark fibers offer a valuable alternative for creating composite materials with randomly oriented reinforcements. The present review study aims to present the different types of bark fibers commonly used in recent times along with their extraction methods, mechanical properties (single fiber tensile strength, density, diameter), and chemical analysis. Characterization tests like Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction analysis (XRD), Thermogravimetric analysis (TGA), and morphological analysis on the bark fibers are also discussed to assess their use as potential reinforcement in composite preparation. </p>