There have been 10 previous Junior Balkan Olympiads in Informatics. Here is an overview of the previous competitions.
JBOI 2008
Shumen, Bulgaria
http://www.math.bas.bg/infos/JBOI_2008.html
JBOI 2009
Shumen, JBOI Initiative
http://cs.org.mk/jboi2009/
JBOI 2010
Shumen, JBOI Initiative
http://cs.org.mk/jboi2010/
JBOI 2011
Bistrica, Romania
http://www.boi2011.ro/jboi2011/
JBOI 2012
Ohrid, Macedonia
http://jboi2012.cs.org.mk
JBOI 2013
Shumen, JBOI Initiative
http://cs.org.mk/jboi2013/
JBOI 2014
Belgrade, Serbia
http://jboi2014.dms.rs
JBOI 2015
Ohrid, Macedonia
http://jboi2015.cs.org.mk/
JBOI 2016
Skopje, Macedonia
http://jboi2016.cs.org.mk/