A full, dynamic microsimulation of Scotland's household composition from 2001 to 2035 is given in this thesis. When projecting populations forward through time this particular method can be a powerful tool in explaining such change(s). Within this project the most systematic dynamic microsimulation of Scotland's household composition is given to date. The simulation process has been completed in conjunction with the General Register Office for Scotland and complements their household projection .methodology. By offering a current and systematic analysis of Scotland's demography, the project gives a platform for further understanding to the key influences and components of change to Scotland's past, present and future population and household composition. Amongst these key influences especial empirical analytic focus is given to relationship formation and dissolution and migration within Scotland. Results from the dynamic microsimulation provide a set of strong indicators to the distribution of demographic change in Scotland until 2035. It is important to note that this project has built a platform for further research into Scotland's population and household composition, which is also elaborated at the closing point of this thesis.