When the COVID-19 pandemic hit Europe in the beginning of 2020, a majority of countries reacted by closing their state borders. By drawing on concepts of border studies and border regional resilience, this thesis aims to examine the impact of the (im)mobility shock caused by the pandemic on two border twin cities in Europe. Through a qualitative approach, conducting semi-structured expert interviews and content analyses, the thesis attempts to identify (1) Which factors facilitated/obstructed the coping/adapting strategies to the problems caused by the pandemic induced state border closures; and (2) Which long-term effects the COVID-19 crisis will have on the future development of the border twin cities and whether their development path will transform into a more resilient one. The main finding of this thesis is that the crisis management on the local level was considerably limited by the restrictions enacted at the national level. To be better prepared for similar shocks, the border twin cities have already made plans based on their experience. However, it remains to be seen whether these strategies can contribute to the resilience of the cities. Nevertheless, coordination between the local, regional and national level is essential to plan and establish resilient border twin cities.