Diphtheria is a communicable disease that contributes to morbidity and mortality in both children and adults. In Indonesia, the disease has disseminated across nearly all provinces, with 2,439 reported cases during the 2022–2024 period. In 2024, the Case Fatality Rate (CFR) for diphtheria in Indonesia was recorded at 4.5%. This study aims to delineate the epidemiological profile of diphtheria…