The Palace of Longoria (Spanish: Palacio de Longoria) is an Art Nouveau palace that the politician and financier Francisco Javier González Longoria ordered to be built in the district of Chueca, at the corner of Fernando VI and Pelayo streets, in the city of Madrid, Spain. Together with the House of Gallardo (Spanish: Casa Gallardo) in the Plaza de España, it is Madrid's most notable example of modernist architecture.

Palace of Longoria
Native name Spanish: Palacio de Longoria
Location	Madrid, Spain
Coordinates	40°25′31″N 3°41′48″W / 40.425395°N 3.69657°W / 40.425395; -3.69657
Built	1902-1904
Architect	José Grases Riera
Architectural style(s)	Art Nouveau
Spanish Cultural Heritage
Official name	Palacio Longoria
Type	Non-movable
Criteria	Monument
Designated	1996
Reference no.	RI-51-0009569
Location of Palace of Longoria in Spain

Longoria contracted the Catalán architect José Grases Riera to design and build it in 1902. It was declared Bien de Interés Cultural in 1996^{[citation needed]} and is currently the headquarters of the Sociedad General de Autores y Editores (SGAE).