With the world population expected to increase by 10 billion by 2050, food demand will increase, particularly in low-income countries. On the other hand, malnutrition might affect up to 2 billion people, putting the need for urgent agriculture reform at the forefront worldwide. The rapid expansion of populations combined with an unprecedented adoption of unsustainable consumption habits depletes natural resources and causes environmental degradation by eutrophication, disruption of ecology, and global warming. These issues are further driven by the widespread usage of pesticides and fertilizers, destroying ecosystems and health disorders. The solution to these international issues makes nanotechnology attractive, providing novel solutions for achieving sustainable agriculture and food security. Nanomaterials like nanoparticles, nanocomposites, and nano biosensors enable better agricultural performance for better yields and more significant precision farming and environmental monitoring. These technologies have a better likelihood of improving ecological change observation, better exploitation of resources, and reducing environmental impacts, hence contributing to improved and sustainable agriculture. Besides, nanomaterials have been identified to play a role in reducing global warming by capturing greenhouse gases. Despite this potential, agricultural nanotechnology faces expensive costs, technical barriers, and environmental questions. However, further research and development could make nanotechnology a game-changer in agriculture that improves production and resilience to climate while reducing environmental degradation. Indeed, such innovation will help mitigate these challenges and go a long way toward food security and sustainability within the following decades.