The Training Workshop on” Population Projection Methods by Using Spectrum 4 Software” was held by Ms. Elham Fathi , Group Leader for Population and Health Statistics of the Statistical Centre of Iran in the SRTC from 23 to 25 December 2019. In this Workshop, the issues such as definitions, application of the software, an introduction to source and terminology of population projection and estimation an introduction to the concepts of mortality, indicators of migration, concepts and indicators of population age and sex structure and training of Spectrum Software for population projection were addressed and presented.