Cropland exposed to flooding frequency (low, medium and high) was calculated in Con Cuong district of Viet Nam to assess the potential impact of flood on cropland and agriculture production for the period 2017-2021. Flooding frequency was calculated using a change detection approach for the period 2017-2021 on Sentinel-1 (SAR) data and overlaid with crop mask (2021). The results were obtained at 10m spatial resolution.