With increasing population and industrialization; anthropogenic activities have led to increased water pollution, creating serious problems for accessing drinking water and water for agricultural purpose. The situation is worst for rural dwellers. This study ‘’iron NPs production for treatment of polluted water for drinking and agricultural purpose: current status and future perspective’’ is a deliberate effort towards solving the menace of water pollution. The paper has reviewed the different methods of iron NPs production. It took a critical look at the chemical method, where iron salts, reducing agents, and capping agents are used for the production of iron NPs. It then moved on to green chemistry methods, where iron salts are used with plants roots and leaves, and other organic extracts as reducing agents to produce iron NPs. This method had been adjudged to be compatible with the environment, cost effective and environmentally friendly. Ultrasound-based technologies have emerged as another powerful synthesizing technique used for iron nanoparticles production; this has also been reviewed in this work. Of interest in this review is the current research break-through where DWTS and slaughter house wastewater was used to produce iron nanoparticles for polluted and wastewater treatment. The paper has clearly posited that iron NPs can be used in the treatment of wastewater. Iron NPs remove pathogens and bacteria from polluted water through a well-articulated mechanism of coagulation, adsorption and photo-catalysis. The paper has stated the WHO standard for portable drinking water that must be met while treating water with iron NPs. The emphasis of this review is on the fact that great advancements are being made in the production of iron NPs and their use for treatment of polluted water in a world that the population is slightly above 8billion people; this is very important.