Ratzinger (means "from Ratzing (de), Bavaria") is the surname of:
- Pope Benedict XVI, Joseph Alois Ratzinger, the current Pope and former head of the Congregation for the Doctrine of the Faith
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- His surname is given to his personal charity the Ratzinger Foundation
- Joseph Cardinal Ratzinger: The Spirit of the Liturgy (book)
- Joseph Ratzinger as Prefect of the Congregation for the Doctrine of the Faith
- Georg Ratzinger, a Catholic priest, musician, conductor, and brother of Pope Benedict XVI
- Georg Ratzinger (politician), a Catholic priest, author, politician, and great-uncle of Georg Ratzinger and Pope Benedict XVI
- Joseph Ratzinger, Sr., the father of Georg Ratzinger and Pope Benedict XVI
- Rudolf "Rudy" Ratzinger (born 1966)