Integrated Sustainable Farming Systems demonstrates how diversified agricultural enterprises—crops, livestock, fisheries, trees, and allied activities—create synergistic farming models resilient to market, climate, and resource variability. This systems-level resource explores design principles, nutrient cycling, resource optimization, and economic risk-spreading in integrated approaches applicable across farm sizes and agroclimatic zones globally. The book synthesizes research from tropical smallholder farms to temperate mixed operations, presenting enterprise combinations, resource flows, labor allocation, and decision-making frameworks suited to local conditions. Topics include crop-livestock-fish integration, agro forestry, renewable energy systems, and value addition through on-farm processing. Case studies from diverse geographies illustrate context-specific model adaptations and economic outcomes. By addressing production, environmental, and livelihood dimensions simultaneously, Integrated Sustainable Farming Systems equips smallholder and commercial farmers, agricultural extension specialists, development practitioners, and policymakers with practical guidance for building climate-resilient, diversified farming enterprises that enhance productivity, profitability, and environmental sustainability.