Dharmadāsa can refer to:
- Dharmadāsa, author of the Sanskrit Vidagdhamukhamaṇḍana
- I. M. Dharmadasa, physicist
- Dharmadasa Walpola (1927–1983), Sri Lankan musician
- Dharmadasa Wanniarachchi (d. 2007), Sri Lankan politician
- Dharmadasa Banda (1938–2010), Sri Lankan politician