Donegal, Mayo and Leitrim are the most law-abiding counties in Ireland.
They had the smallest amounts of people jailed in 2020, based on population size.
Longford was the most law-breaking county - with an imprisonment rate of 198 people per 100,000 population.
Longford garda David Conroy, from Garda Representative Association, says there's been a crime problem in the area.
In the northern sound region Cavan has been deemed the 7th most law breaking county in the country.
The rate there is 98 per 100,000 population.
Last year just under 5,300 people were sent to prisons throughout the country.
Nationally, an average of 89 people 100,000 population were jailed in 2020.
A breakdown, based on the home addresses of the criminals, shows which counties have the highest and lowest rates of imprisonment.
Monaghan's rate of imprisonment however, is 88 just below the national average of 89.
