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The most significant flood that caused more than USD 90 million economic loss occurred in South Kalimantan at the beginning of 2021. It took casualties of 21 people, and more than 70,000 people needed to be evacuated. There are various statements related to the main trigger of the flood; however, most of them require more in-depth study. Even though the causes are still unclear, a risk management assessment is necessary to mitigate future events. This study aims to provide recommendations for suitable flood measures by conducting a zoning assessment of the flood risk. Here, we focus our analysis on the center of South Kalimantan, Banjarmasin, as a study case. To achieve the main objective, we conduct a study by identifying hazard risks, community vulnerability assessments to risks, developing preparedness and mitigation plans, implementing plans, monitoring, evaluating, revising, and updating plans. The stages of the research carried out were literature review, interview, protocol analysis, and evaluation. The data used is a combination of literature and policy documents examined and refined through discussions with stakeholders, shareholders, and those involved in policymaking. We first identify the variables of hazard and vulnerability. The identified variables of hazard including flood inundation duration, depth, and area. For the vulnerability, the identified variables consist of environmental (rainfall and land use), physical (education and religious facilities), and social vulnerabilities (population density and growth rate). We then give score to all variables which is classified into three categories: high, medium, and low risks. From the viewpoint of flood inundation, the results show that 8,000 to 10,000 ha of area in Banjarmasin is considered at high risk of flooding. However, it was considered low and medium risk based on mean inundation depth and recorded flood duration, respectively. Finally, it is expected that this study could provide information for local authorities to mitigate flood hazards in the future. [ABSTRACT FROM AUTHOR]