Dossabhoy Muncherji Raja (1873–1947) was the first native Indian to be appointed 'Principal Appraiser' of precious stones for the customs office of the Bombay Presidency, which was then a province of British India.

The title of Khan Sahib was conferred upon Dossabhoy Raja on 2 January 1933 by the (then) Viceroy and Governor General of India, Lord Willingdon, in recognition of his role in the apprehension of a gang of smugglers.

Raja had surreptitiously visited Jamnagar on the Gulf of Kutch in Gujarat, which was then under a Nawab's rule and outside British Imperial jurisdiction.

Clad in a dhoti and posing as a Gujarati trader, Raja had then risked his life to collect information on smugglers operating on the northern borders of the Presidency.

Dossabhoy Muncherji Raja was a Parsi-Zoroastrian and a resident of Bombay's (today Mumbai) Dadar Parsi Colony.