Methylene blue (MB), the most widely used colorant in the textile industry, pollutes water bodies, rendering them unusable, and produces a global environmental challenge due to its high toxicity and harmful effects. In this study, lignin-based metal organic frameworks (lignin–MOFs) are prepared from Organosolv lignin and Soda lignin, respectively, to develop a highly efficient, cost-effective, and environmentally friendly adsorbent for the removal of MB from aqueous solutions. The introduction of a synthesis method based on a room temperature linker salt approach, with lignin acting as a bio ligand, will facilitate the formation of porous structures: high surface area in MOFs, combined with the rich functional groups of lignin, will result in an efficient adsorption process. The resulting material was characterized using Scanning Electron Microscopy (SEM), Fourier-Transform Infrared spectroscopy (FTIR), X-ray diffraction (XRD), Thermogravimetric Analysis (TGA), and nitrogen adsorption–desorption analysis (BET) to confirm its structure, morphology, and porosity. Batch adsorption experiments were conducted to evaluate the adsorption efficiency of the prepared lignin–MOFs in comparison with conventional MIL53(Al). To understand the adsorption mechanisms, adsorption kinetics and isotherms were modelled using the pseudo-second-order and the Langmuir models, respectively. The synthesized lignin-derived MOFs exhibited a nano-scale particle-like morphology: a porous, thermally stable crystalline structure with a high specific surface area was observed, confirming their suitability as a non-toxic adsorbent compared to conventional synthetic organic ligand-derived MOFs. Adsorption experiments showed that the prepared lignin material effectively removed MB. This research successfully demonstrates the potential of using the eco-friendly, low-cost precursor lignin to fabricate highly efficient biobased MOFs for water purification.