Casa Vicens is a single-family residence designed by Antoni Gaudí and built for Manuel Vicens. It was the first Gaudí designed. It is located at Carrer de les Carolines, 18-24, Gràcia District in Barcelona.

The site was small (smaller today after the widening of the street) and conventional structures already existed in the area. This early work exhibits several influences, most notably the Moorish (or Mudéjar) influence, particularly evident at the top. The house is constructed of undressed stone, rough red bricks, and colored ceramic tiles in checkerboard and floral patterns. Manuel Vicens was the owner of a brick and tile factory so the ceramic tiles pay tribute to his employment. The yellow, zinnia-flowered tile, designed by Gaudí, was manufactured by Vicens.

The plan is asymmetrical with protruding gables and buttresses. Galleries project even farther at the top. Rooftop towers are reminiscent of Moorish architecture.