| Francis Lucas Nyalali | |
| Birth Date: | 1935 2, df=yes |
| Birth Place: | Kasubuya, Mwanza, Tanganyika Territory |
| Death Place: | Dar es Salaam, Tanzania |
| Office1: | 4th Chief Justice of Tanzania |
| President1: | Julius Nyerere |
| Term Start1: | 1977 |
| Term End1: | 2000 |
| Predecessor1: | Augustine Saidi |
| Successor1: | Barnabas Samatta |
| Term Start2: | 1991 |
| Term End2: | 2002 |
| Occupation: | Lawyer Judge |
Francis Lucas Nyalali (3 February 1935 – 2 April 2003) was the Chief Justice of Tanzania from 1977 to 2000, making him the longest serving Chief Justice in the country's history, serving longer than the average serving time for a Chief Justice within the Commonwealth of Nations, which is approximately 3.6 years. He was known for promoting easy access to justice, the rule of law, constitutionalism, and human rights.
In 1991, he chaired the Nyalali Commission, a presidential body tasked with reviewing Tanzania's political system. The commission's recommendations included reintroducing multi-party politics and reassessing the union between Tanganyika and Zanzibar.[1] [2]