Thisbook constitutes the refereed proceedings of the 11th Pacific Asia Workshop onIntelligence and Security Informatics, PAISI 2016, held in Auckland, NewZealand, in April 2016 in conjunction with PAKDD 2016, the 20th Pacific-AsiaConference on Knowledge Discovery and Data Mining.

The7 revised full papers presented together with 7 short papers were carefullyreviewed and selected from 23 submissions. The papers cover network-based dataanalytics, data and text mining, and cyber security and infrastructureprotection.