Darwin Lumbantobing (born 22 August 1956) is an Indonesian religious leader, public speaker, and author who served as the 16th Ephorus of Huria Kristen Batak Protestan (HKBP), a Protestant Christian denomination in Indonesia from 2016 to 2020.

He was succeeded by Robinson Butarbutar Lumbantobing was born in the city of Rawang, North Sumatra, Indonesia.

He was raised in a Christian family and was heavily influenced by his faith from a young age.

He received his education in local schools and later studied theology at a seminary in STT HKBP Nommensen Pematangsiantar.

As Ephorus, Lumbantobing was responsible for overseeing the spiritual and administrative aspects of the HKBP.