- October 11 – Greetings of the WCC general secretary, Rev. Dr Olav Fykse Tveit, to the Synod of Bishops XIII Ordinary General Assembly on 7-28 October 2013 in Rome
- October 9 – Protestants no longer the majority in US, study says
- October 10 – US church calls to reevaluate military aid to Israel
- October 2 – New software uses smartphone camera for spying
- October 13 – UN warns of looming worldwide food crisis in 2013
- October 17 – Representatives of Christian Denominations Address Synod
