The coastal area of Eretan-Ilir, Indramayu Regency, faces serious problems in the form of tidal flooding which results in economic losses and environmental vulnerability. This study aims to analyze the suitability of implementing Nature-based Solutions (NbS) in efforts to reduce the risk of tidal flooding based on the classification of built-up and non-built-up areas. The method used is quantitative analysis through a spatial approach with overlay and intersect techniques using land cover data, spatial patterns, and inundation potential. The results show that non-built-up areas dominate with an area of 705.01 Ha (79%), while built-up areas cover 182.80 Ha (21%). The suitability of NbS in non-built-up areas includes mangrove restoration, biopores, bioswales, coastal nourishment, and silvofishery, while in built-up areas include coastal green corridors, green open space development, environmental education programs, green dikes, and vertical mangrove structures. Analysis of the suitability of NbS to spatial patterns shows that there are still incompatibilities, especially in Ilir Village with an area of 173.30 Ha. This study confirms that the implementation of NbS has the potential to increase the resilience of coastal areas to tidal flooding, but requires adjustments to spatial planning and community participation for optimal implementation.