| African Democratic Alliance Party | |
| Abbreviation: | ADA-TADEA |
| Country: | Tanzania |
| Chairman: | Juma Ali Khatib |
| Secretary General: | Saleh Msumari |
| Seats1 Title: | National Assembly |
| Seats2 Title: | Zanzibar HoR |
| Foundation: | 28 August 1992 |
The Tanzania Democratic Alliance (TADEA) is a political party in Tanzania. The party was registered on 28 August 1992 formerly known as Tanzania Democratic Alliance and currently as African Democratic Alliance Party. It is predominant in semi-autonomous islands of Zanzibar, Tanzania.
John D. Lifa Chipaka was its previous long served president.