Fabian Núñez (Fabián Núñez, Fabian Nuñez and less commonly Fabian Nunez) (born December 27, 1966, Logan Heights, San Diego, California, United States) has been a labor union adviser and a Democratic politician. He served three two year terms as a member of the State Assembly, leaving office late in 2008. During his last two terms, Nunez was the Assembly Speaker, the 66th person to hold that position.

From 1996 to 2000, Fabian Núñez served as the Political Director for the Los Angeles County Federation of Labor and, between 2000-2002, was the Government Affairs Director for the Los Angeles Unified School District.

Núñez was elected to the California State Assembly to represent the 46th district in 2002. Later, on February 9, 2004 he was selected as the Speaker of the California Assembly.