Lignocellulosic Fibers are classified primarily by their source material, which shapes processing routes and end‑use economics. Natural fibers encompass wood‑derived pulp, agricultural residues (e.g., straw, bagasse), and herbaceous grasses such as kenaf or jute. These feedstocks dominate the market because they are abundant, low‑cost, and compatible with existing pulping infrastructure, collectively accounting for roughly 70 % of global sales. Engineered fibers include nanocellulose, bacterial cellulose, and chemically modified cellulose derivatives. Although produced in smaller volumes, engineered fibers command higher price points due to superior mechanical strength, barrier properties, and functionalization potential; they represent the remaining 30 % of market revenue. Within natural fibers, wood pulp alone contributes about 45 % of total value, while agricultural residues add 20 % and grasses 5 %. Engineered sub‑segments are split between nanocellulose (18 %) and specialty cellulose (12 %). This taxonomy clarifies how source diversity drives the overall Lignocellulosic Fibers market size.