The article analyses the transformation of Swiss migration statistics through digital data processing in the 1970s and 1980s. It focuses on the emergence of two different modes of migration statistics management within the Swiss federal administration. First, in the early 1970s, the Swiss Federal Aliens Police implemented an electronic database with comprehensive statistics on foreigners, the so-called Central Aliens Register. It was devised as a data-driven instrument for regulating labour supply within the scope of the Western European guest worker regime. Then, in the mid-1980s, the Swiss Federal Statistical Office introduced periodical population scenario analysis. The modelling of future demographic scenarios, based on existing data, shifted the perspective towards a new global migration framework. It is shown how this computerisation of statistical data infrastructures in the 1970s/1980s enabled the combination of different regulatory regimes for population movements within the federal administration (labour/asylum), thus, contributing to the formation of a Swiss migration regime.