Baba Deep Singh (Punjabi: ਬਾਬਾ ਦੀਪਸਿੰਘ ਸ਼ਹੀਦ; Hindi: बाबा दीप सिंह जी शहीद) (1682–1757) is revered among Sikhs as one of the most hallowed martyrs in Sikhism and as a highly religious person. He is remembered for his sacrifice and devotion to the teachings of the Sikh Gurus. Baba Deep Singh was the first head of Misl Shaheedan Tarna Dal – an order of the Khalsa military established by Nawab Kapur Singh, the then head of Sharomani Panth Akali Buddha Dal.
The Damdami Taksal also state he was their first head of their order. His name is also found as Deep Singh (without the “Baba” honorific) and Baba Deep Singh.