Donegal is the most law-abiding county in the country.
Longford had the highest rate of imprisonment in Ireland last year - followed by Limerick, Dublin and Louth.
161 people were jailed in Longford, per 100,000 population.
Donegal was the most law-abiding county, per capita, with rate of just 34.
Former governor of Mountjoy Prison, John Lonergan, says some areas linked to gangland crime have high rates.
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