The links between population patterns and trends, and policy and planning for the justice system is important. The trends in the number of convictions and imprisonments by regional councils are investigated for the period 1986 to 2001. This does not just focus on Custodial sentences but also looks at other types of sentences such as monetary and community sentences. Additionally, a regional estimate of the muster in prison is derived to give “normal” place of residence of those in prison. The relationship of imprisonment to other factors such as income, unemployment, sickness/invalid benefit rates, labour force participation rates and ethnicity is investigated. Some policy implications of these findings are presented.