The mobility behaviour of the Swiss population has changed significantly due to the COVID-19 pandemic. On behalf of the Statistical Office of the Canton of Zurich, the Swiss National COVID-19 Science Task Force, the Swiss Federal Statistical Office and the Swiss Federal Institute of Technology’s (ETH) Business Cycle Research Unit, we conducted a mobility tracking of the Swiss population. The focus is on the developments of the daily distances travelled, the use of means of transport and the purpose of mobility. The study was completed in July 2021.