The study presents a harmonized atlas of the dorsal root ganglion (DRG) and trigeminal ganglion (TG) cell types, integrating data from 31 datasets across six species. The atlas describes 18 neuronal and 11 non-neuronal cell types, improving cell type annotation and transcriptomic coverage compared to individual studies. The harmonized atlas facilitates cross-study and cross-species comparisons, revealing broad transcriptomic similarities between human and mouse sensory ganglia but also notable differences. The atlas is a valuable resource for studying cell-type-specific gene expression and understanding species differences in somatosensory cell identity.The study presents a harmonized atlas of the dorsal root ganglion (DRG) and trigeminal ganglion (TG) cell types, integrating data from 31 datasets across six species. The atlas describes 18 neuronal and 11 non-neuronal cell types, improving cell type annotation and transcriptomic coverage compared to individual studies. The harmonized atlas facilitates cross-study and cross-species comparisons, revealing broad transcriptomic similarities between human and mouse sensory ganglia but also notable differences. The atlas is a valuable resource for studying cell-type-specific gene expression and understanding species differences in somatosensory cell identity.