The Casa Rull is a building in Reus, Catalonia, Spain, designed by the Modernist architect Lluís Domènech i Montaner. Since 1925 the building is owned by the City Council of Reus, and is currently the headquarters of the Culture Department of the town.
The notary Pere Rull i Trilla of Reus contracted Lluís Domènech i Muntaner as the architect of his new house. The building was constructed in 1901. In 1996 it was renovated by the local architect Joan Figuerola.
The building is close to another Modernist building designed by Lluís Domènech i Muntaner, the Casa Gasull.
Nowadays, as a public building of the city council, some cultural events take part in the building and the garden surrounding the building.