| Alcides Mañay | |
| Fullname: | Alcides Javier Mañay Castro |
| Birth Date: | 18 January 1927 |
| Birth Place: | Montevideo, Uruguay[1] |
| Position: | Midfielder |
| Nationalteam1: | Uruguay |
| Nationalyears1: | 1945 |
| Nationalcaps1: | 1 |
| Nationalgoals1: | 0 |
| Clubs1: | Defensor Sporting |
| Years1: | 1945–1947 |
| Clubs2: | Cúcuta Deportivo |
| Years2: | 1950–1953 |
| Clubs3: | AS Cannes |
| Years3: | 1953–1955 |
Alcides Javier Mañay Castro (born 18 January 1927) was a Uruguayan footballer. He played in one match for the Uruguay national football team in 1945.[2] He was also part of Uruguay's squad for the 1946 South American Championship.[3]