The members of the 20th General Assembly of Newfoundland were elected in the Newfoundland general election held in October 1904.

The Liberal Party led by Robert Bond formed the government.

[2] Sir William MacGregor served as colonial governor of Newfoundland until 1907 when Newfoundland became a dominion and continued to serve as governor for the dominion until 1909.

[3] The following members were elected to the assembly in 1904:[4] Notes:

By-elections were held to replace members for various reasons: Notes: