Palazzo Memmo Martinengo Mandelli (also known as Ca' Memmo) is a palace in Venice, Italy, located in the Cannaregio district, overlooking the left side of the Grand Canal, between Palazzo Gritti Dandolo and the Church of San Marcuola.

The palace was the residence of Andrea Memmo (1721–1792),[2] an elected prosecutor in 1775, who is known for his friendship with Giacomo Casanova.

After several structures neighboring the palace on the right had been demolished, the right wing was rebuilt to add a garden.

The asymmetrical neoclassical façade appears to split into levels thanks to the use of frames and bands of Istrian stone that connect windowsills, windows, and lintels.

The palace extends in depth and has both a central courtyard and a garden.