Lala Deen Dayal (1844 – 1905) famously known as Raja Deen Dayal was an Indian photographer. His career began in the mid-1870s as a commissioned photographer; eventually he set up studios in Indore, Mumbai and Hyderabad. 

He became the court photographer to the sixth Nizam of Hyderabad, Mahbub Ali Khan, Asif Jah VI, who awarded him the title ‘Raja Bahadur Musavvir Jung Bahadur’, and he was appointed as the photographer to the Viceroy of India in 1885.

He received the Royal Warrant from Queen Victoria in 1897.