This report presents a secondary data analysis and triangulation of the Tanzania Demographic and Health Survey (DHS) 2010, the Tanzania HIV and Malaria Indicator Survey (THMIS) 2011-12, and the Violence Against Children in Tanzania Survey (VACS) 2009. Its objectives are to analyse approximately 40 key indicators related to knowledge, attitudes, behaviours and outcomes (e.g. living arrangements, school attendance, illiteracy, marriage, pregnancy, violence and HIV) of females and males ages 10-14, 15-19 and 20-24 years to determine their specific vulnerabilities at national, urban/rural and regional levels, where possible.