O'Mahony, John and Tapley, Nigel (2015) Driver attitudes & behaviour survey 2014. Dublin: Road Safety Authority.

O'Mahony, John (2021) Driver attitudes & behaviour survey 2020. Dublin: Road Safety Authority.

O'Mahony, John, ed. (2007) Drugs and Ireland. Cork: Irish Examiner.

O'Mahony, John, ed. (2008) Let's talk drugs: How to talk to your children about drugs. Cork: Irish Examiner.

O'Mahony, John, ed. (2012) Let's talk suicide. Dublin: Irish Examiner & Irish Patients Association .

Dunne, E and Duggan, M and O'Mahony, John (2012) Mental health services for homeless: patient profile and factors associated with suicide and homicide. Irish Medical Journal , 105 , (3) , pp. 71-74.

O'Mahony, John (2017) RSA alcohol and driving research 2017. Dublin: Road Safety Authority.