Doña Casilda Iturrizar Park is a public park located in the city of Bilbao (Basque Autonomous Community, Spain), in the central neighbourhood of Indautxu.

It is named after Casilda Iturrizar (1818 – 1900), who donated the land and was a prominent philanthropist in the city.

It features an English-style garden created more than 100 years ago, which highlights the perfectly preserved examples of many centenary tree species.

There is also a cybernetic fountain that offers sound and light shows during the holidays, surrounded by a shaded walkway (called a pergola) as well as a large space where concerts can be held.

The park remains the main green space of the city, although it is no longer the only one.