Is solidarity in bioethics or public health ethics necessary? If so, why? Is there room for a principle of obligatory solidarity in bioethics or in public health ethics? In the first part of this paper, I assess the meaning of the value of solidarity in ethics. In the second part, I propose insights into the republican interpretation of solidarity, or, more correctly, “civic” solidarity. This is crucial to be able to distinguish between different sources of, and justifications for, solidarity, some (...) legitimate and some not legitimate. In the third part of the paper, I apply the republican concept of civic solidarity to the field of bioethics and public health ethics. This is intended to show how civic republicanism can correct both liberal deficiencies and communitarian excesses in bioethics. Civic solidarity is essential to finding this middle way. It is a key concept, considering the challenges that we face as citizens, health professionals and patients. Finally, the paper concludes with a summary and a plan for further research in this area. (shrink)