This study aims to understand the impact of the Covid-19 pandemic on human milk banking services in North America, with a focus on the United States. We triangulated questionnaire data with interviews and text-based website data. Of the 30 human milk bank services from which data were obtained, the majority faced substantial internal organization change in terms of staffing and protocols and experienced financial hardship in particular because of decreases in donor human milk orders. At the same time, most banks reported an increase in their numbers of donors and in the volume of milk collected. These results show that the pandemic significantly affected the way in which many North American milk banks operate, some lactating mothers donate their milk and, at least during the first few months of the crisis, certain hospitals' donor human milk ordering patterns changed. It suggests in particular that stay-at-home orders and the turn to remote work created the potential for a surge in human milk available for donation as a number of parents no longer needed their surplus for their own children. Legal and policy reform should focus on replicating the positive effects of the pandemic on breastfeeding by guaranteeing paid parental leave and flexible work conditions. Initiatives should also aim at counteracting its negative effects by mandating the insurance coverage of donor human milk, supporting milk banks financially and, more generally, integrating lactation and human milk banking services within the health system.