The Social Indicator Sample Survey (SISS) was carried out in 2013 by the National Statistical Office of Mongolia in collaboration with UN Children’s Fund (UNICEF) and UN Population Fund (UNFPA), as part of the global Multiple Indicators Cluster Survey (MICS5) programme. UNICEF and UNFPA provided technical and financial support. The survey, the largest of its kind ever conducted in Mongolia, included 15,500 households and combined the Multiple Indicators Cluster Survey (MICS), Reproductive Health Survey (RHS) and Demographic and Health Survey (DHS). This survey marked the introduction of tablets for large-scale data collection. SISS 2013 collected data to compile indicators in the areas of health, education, development, protection, well-being and rights of children and women. In addition, data on reproductive health, family planning, knowledge and attitude towards HIV/AIDS, and sexual behaviour of Mongolian men and women was collected.