 The COVID-19 pandemic caused a significant reduction in contact rates among the Dutch population. A longitudinal survey was conducted to measure changes in contact rates over the course of the pandemic. The survey included 1659 participants from April to August 2020 and 2,514 participants from December 2020 to September 2021. Participants were asked to report the number of unique contacts they had with people outside their households each day. As the pandemic progressed, the number of contacts reported by participants increased, suggesting that relaxation of social distancing restrictions led to higher contact rates. This article was authored by Jantien A. Bakker, Lawrence Bogard, Philippe Buttels, and others.