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The increasing demand for energy and food security are two crucial aspects of sustainable development. This research analyzes integrated planning to meet the needs of electric energy and rice farming irrigation around the Ketenger Hydropower Plant (PLTA) in Banyumas Regency, Central Java Province. The research aims to understand the plans for the availability of electric energy at the PLTA and the availability of water in Ketenger village, which will be utilized for rice farming irrigation for the years 2022–2033. The research methodology involves the analysis of hydrological data, electricity demand, and rice irrigation water requirements. The Low Emissions Analysis Platform (LEAP) is employed to model various development scenarios, considering technical, economic, and environmental aspects. Simulations are conducted using LEAP software to forecast electricity demand in Banyumas Regency and the availability of water in Ketenger Village, as well as the availability of electric energy by the Ketenger Hydropower Plant using the Business As Usual scenario with trend and econometric approaches. The research findings indicate that the integration of electricity and irrigation systems can provide significant benefits in terms of resource utilization efficiency and sustainability. Projections for electricity consumption in Banyumas Regency show an increase, with a total average annual growth of 6.91% from 2022 to 2033. However, the Ketenger Hydropower Plant can only supply 5.2% of the energy in 2022 and 17.5% in 2033, necessitating additional electricity generation from other power plants to produce 1,572,860.76 MWh of electric energy in 2033. Projections for water needs in Ketenger Village for rice crop productivity show a requirement of 10,517.26 mm/year until 2033. This indicates that the average monthly rainfall in 2022 is optimal at 662.83 mm/month, as well as in 2033, with increased water availability at 876 mm/month. This assumes that the average amount of water needed for optimal rice production is 180-300 mm/month. This research contributes to the understanding of integrated planning for energy and agriculture, focusing on areas dependent on water resources from hydropower plants.