1 April - The National Athletics and Cycling Association is suspended from the International Amateur Athletic Federation for refusing to confine its activities to the Free State side of the border.
18 June - Ministry of Home Affairs bans all parades from this date, but lifts it for 12 July parades.
12 July - Rioting breaks out in Belfast following Orange Order parades. By 21 July nine people have been shot dead and scores injured. Rioting continues to the end of August, by which time eight Protestants and five Catholics have been killed, hundreds injured and over 2,000 homes destroyed (almost all Catholic).