circAge is an extensive circular RNA (circRNA) database meticulously curated to focus on aging-related circRNAs spanning diverse tissues and age states. It boasts circRNA expression profiles and regulatory networks intricately associated with the aging process. circAge facilitates the seamless examination of circRNA expression patterns and differential expression across various tissues and age categories. Moreover, it features a robust function prediction module tailored for circRNAs, encompassing circRNA-miRNA binding, circRNA-RNA-binding protein (RBP) interactions, circRNA coding potentials, and conservation analysis. By amalgamating multi-dimensional circRNA expression data, circAge endeavors to unveil the intrinsic correlations between circRNAs and the intricate aging trajectory. Serving as an indispensable asset, circAge empowers researchers to comprehend and harness the potential of circRNAs in the realm of aging studies. Through meticulous scrutiny of circRNA expression modalities and regulatory mechanisms, circAge furnishes invaluable data support and novel insights indispensable for advancing aging biology research.