This study investigates how youth from two cities in the United States engage in critical data practices as they learn about and take action in their lives and communities in relation to COVID-19 and its intersections with justice-related concerns. Guided by theories of critical data literacies and data justice, a historicized and future-oriented participatory methodological approach is used to center the lived lives and communities of participants through dialogic interviews and experience sampling method. Data were co-analyzed with participants using critical grounded theory. Findings illustrate how youth not only aimed to reveal the dynamic and human aspects of and relationships with data as they engage with/in the world as people who matter but also offered alternative infrastructures for counter data production and aggregation toward justice in the here and now and desired possible futures. Implications for studies of learning with/through data practices in everyday life in relation to issues of justice are discussed.