<p>The Sundarbans Mangrove Forest (SMF) in Bangladesh is a highly productive and biodiverse ecosystem that provides a variety of essential ecosystem services. However, the region has experienced significant land use changes and intensified resource extraction, which have impacted the quality of the habitat. This study aims to evaluate the temporal changes in habitat quality within the SMF and its surrounding administrative boundary from 2000 to 2023, using InVEST Habitat Quality model. The InVEST model leverages land use/land cover (LULC) data representing ecosystems and other relevant factors to assess habitat quality. The results indicate substantial changes in LULC during the study period, with gains in aquaculture area (293.86 km²), barelands (82.47 km²), built-up areas (202.34 km²), sandy areas (1.55 km²), and waterbodies (5.11 km²), and losses in vegetation (-191.85 km²) and agriculture (-393.48 km²). The expansion of aquaculture occurred at the expense of agricultural/arable land, leading to an overall decrease in habitat quality. Specifically, from 2000 to 2023, waterbodies experienced the most significant decrease in habitat quality, while bare lands showed the least decrease. In contrast, habitat quality in built-up areas increased consistently over the years could be attributed to enhanced urban greening initiatives and/or stricter enforcement of environmental regulations in those regions. These findings provide valuable insights into the habitat dynamics of the SMF, which can inform government and stakeholder efforts to develop effective management strategies for preserving this vital ecosystem.</p>