Prospero Casia Sanidad (17 January 1897 – 1969) was a Filipino lawyer and politician.

Lastly, he served as Secretary of Public Works and Communications from 1950 to 1951.

He was elected again to the position in 1938 and reelected in 1941, but was only able to take his second consecutive term in office due to the Japanese occupation during the Second World War.

[2] In 1946, he joined the Liberal Party and ran for the Philippine Senate but lost.

However, he filed an electoral protest that became highly controversial, as it coincided with other protests filed against members of Congress belonging to the Nacionalista Party and the Democratic Alliance.