| Castor Cantero | |
| Fullname: | Sixto Castor Cantero Bordón |
| Birth Date: | 1918 1, df=yes |
| Birth Place: | Paraguay |
| Position: | Midfielder |
| Nationalteam1: | Paraguay |
Sixto Castor Cantero Bordón (born 12 January 1918, date of death unknown) was a Paraguayan football midfielder.
Cantero was part of the Paraguay national football team that participated in the 1950 FIFA World Cup and the Copa América tournaments of 1946 and 1949.[1] He has 34 caps and no goals playing for Paraguay between 1942 and 1950.[2] During most of his career he played for Olimpia Asunción.[3] Cantero is deceased.[4]