The UNC 4D Lifespan Cerebellum Atlases provide an age-conditioned multimodal MRI reference of the human cerebellum spanning birth to 100 years. The resource includes cerebellar atlases at 31 representative ages, with T1w, T2w, T1w/T2w ratio, tissue segmentation, anatomical parcellation, and cerebellar mask volumes aligned to a common UNC BCP/MNI space. Functional parcellations are also provided where available. This resource supports age-matched spatial normalization, cerebellar anatomical analysis, and quantitative studies of cerebellar development and aging.