Cunobelinus was the most significant figure in Britain during the decades leading up to the Roman invasion, though his reign has received relatively little attention. Cunobelinus' coinage is of great importance to understanding the socio-political structure of South-East Britain prior to the Roman invasion and whilst studies of his gold and silver have been published in previous editions of Britannia (Allen 1975; de Jersey 2001), his bronzes have been subject to surprisingly little work, particularly considering that they are by far the most common struck bronze issues known from Iron Age Britain, with a total of 2,608 examples currently recorded in the Celtic Coin Index and on the PAS database combined. This study proposes a broad typological scheme with which Cunobelinus' bronzes can be ordered and demonstrates that, like Cunobelinus' silver, but unlike his gold, they can be divided into three regional groupings, which it can be argued correspond to three different political sub-groupings under Cunobelinus' control. In addition, the bronze's metallurgy and metrology and the mints at which they were struck are investigated. This article examines the contribution of coinage to understanding Cunobelinus' political history, and how he used imagery to reinforce and legitimate his power in the different regions under his control at different times during his reign. The types of sites at which Cunobelinus' bronzes have been found are also outlined and the likely function of the coins discussed.