| Sinhalese Great Assembly | |
| Native Name: | Sinhala Maha Sabha |
| Lang1: | Sinhala |
| Name Lang1: | සිංහල මහා සභා |
| Lang2: | Tamil |
| Name Lang2: | சிங்கள மகா சபை |
| Founder: | S. W. R. D. Bandaranaike |
| Founded: | 1936 |
| Split: | United National Party (in 1951) |
| Merged: | United National Party (in 1946) |
| Successor: | Sri Lanka Freedom Party |
| Ideology: | Sinhalese Buddhist nationalism |
| Country: | Sri Lanka |
The Sinhala Maha Sabha (si|සිංහල මහා සභා) was a political party in colonial-era Ceylon founded by S. W. R. D. Bandaranaike in the mid-1930s to promote Sinhalese Buddhist culture and community interests. In 1946, it joined the United National Party, before leaving the coalition in 1951 to form the Sri Lanka Freedom Party.