Rabbit CCL19 (C-C motif chemokine ligand 19), also known as macrophage inflammatory protein-3β (MIP-3β) or EBI1 ligand chemokine (ELC), is a member of the CC chemokine family that plays a key role in lymphocyte trafficking and organization of secondary lymphoid tissues in rabbits (Oryctolagus cuniculus). CCL19 is produced primarily by stromal cells, dendritic cells, and macrophages within lymph nodes, spleen, and other lymphoid organs, and it signals through the CCR7 receptor to direct migration of naïve T cells, central memory T cells, regulatory T cells, and mature dendritic cells. The CCL19–CCR7 axis is essential for antigen presentation, T cell priming, and maintenance of lymphoid architecture. In healthy rabbits, CCL19 supports immune surveillance and proper immune cell compartmentalization; expression may increase during infection, vaccination, chronic inflammation, or neoplastic disease. In biomedical and translational research, rabbit CCL19 is of particular interest in studies of vaccine immunogenicity, immune-mediated disease, tumor immunology, and infectious disease models, where understanding CCR7-mediated immune cell trafficking contributes to insights into adaptive immune regulation and lymphoid tissue organization.