Weed infestations in barley can cause yield reductions and reduce the quality of harvested product. Weed management before, during and after the crop is important to reduce weed populations. Weed management in barley is currently heavily reliant on herbicides for weed control, and this reactive approach has resulted in widespread herbicide resistance across the world. This chapter examines the problem of weeds in barley and explains the application of Integrated Weed Management (IWM) to barley cultivation. The chapter outlines weed control tactics and the practical implementation of IWM, focussing on specific examples of IWM in barley. Finally, the chapter provides detailed further reading on this issue.