| Prospero Sanidad | |
| Party: | Liberal (1946-1947) Nacionalista (1934-1946) |
| Birth Name: | Prospero Casia Sanidad |
| Birth Date: | 17 January 1897 |
| Birth Place: | Narvacan, Ilocos Sur, Captaincy General of the Philippines |
| Death Place: | Philippines |
| Alma Mater: | University of the Philippines George Washington University National University School of Law |
| Spouse: | Rosario Centeno |
| Children: | 3 |
| Office: | 10th Secretary of Public Works and Communications |
| Term Start: | February 21, 1950 |
| Term End: | 1951 |
| President: | Elpidio Quirino |
| Predecessor: | Ricardo Nepomuceno |
| Successor: | Sotero Baluyut |
| Term Start2: | 22 May 1947 |
| Term End2: | 30 December 1947 |
| Office3: | Member of the House of Representatives from Ilocos Sur's 2nd district |
| Term Start3: | 30 December 1938 |
| Term End3: | 25 May 1946 |
| Term Start4: | 5 June 1934 |
| Term End4: | 16 September 1935 |
| Predecessor3: | Sixto Brillantes Sr. |
| Successor3: | Fidel Villanueva |
| Predecessor4: | Fidel Villanueva |
| Successor4: | Sixto Brillanes Sr. |
Prospero Casia Sanidad (17 January 1897 – 1969) was a Filipino lawyer and politician. He represented the second district of Ilocos Sur at the House of Representatives of the Philippines from 1934 to 1935, again from 1938 to 1941, and finally from 1945 to 1946. He then served as Senator of the Philippines from May 22, 1947 to December 30, 1947. Lastly, he served as Secretary of Public Works and Communications from 1950 to 1951.
Sanidad was born on 17 January 1897 in Narvacan, Ilocos Sur to Cipriano Sanidad and Cayetana Casia. He pursued his higher education at the University of the Philippines, George Washington University and the National University School of Law in Washington DC, where he graduated with a Bachelor of Laws degree. He was admitted to the Bar in 1928.[1]
Sanidad was elected in 1934 to the House of Representatives as a Nacionalista representative of Ilocos Sur's 2nd district in 1934 and served until 1935. 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. In 1947, he won his protest and was sworn in, replacing José E. Romero.[3]
Sanidad was married to Rosario Centeno and had three children.[1]