This paper presents the results of my PhD research which examines the numismatic evidence from the northern frontier of Roman Britain. This analysis is the result of the creation of a database containing detailed records for c.38,000 Roman coins found in northern England and southern Scotland. Previous studies have been largely restricted to discussions of coins from the military communities based along Hadrian’s Wall itself rather than seeking to encompass a broader frontier zone. The study area of this research has included the Wall itself but also its wider setting by covering southern Scotland and northern England. This broad geographic area has allowed the examination of the usage of coinage not just amongst the military communities along the Wall but differences in usage between the military and non-military communities inhabiting the frontier and between those living beyond and behind the Wall.