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Wetlands are crucial ecosystems as they enhance the quality of groundwater, protect from natural hazards, control erosion, and provide habitat to rare species of flora and fauna. Despite being valuable ecosystems, wetlands worldwide are decreasing in many regions, making mapping and monitoring of wetlands crucial. Large-scale wetlands mapping is challenging but recent advancements in machine learning, time series earth observation data, and cloud computing have opened doors to new techniques to overcome such limitations. Through evaluating the effectiveness of different classification methods, this study provides a brief analysis of wetlands dynamics in Sylhet, Bangladesh. The analysis is carried out between 1985 and 2022 using Google Earth Engine, Landsat imagery, and several spectral indices. To obtain reliable results, four classification algorithms (Random Forest, Minimum Distance …