| Maider Castillo Muga | |
| Fullname: | Maider Castillo |
| Birth Date: | 1976 8, df=yes |
| Birth Place: | Eibar, Spain |
| Height: | 1.61m (05.28feet) |
| Position: | Defender |
| Years1: | 1989–1999 |
| Years2: | 1998 |
| Years3: | 1999–2001 |
| Years4: | 2001–2015 |
| Clubs1: | Eibartarrak FT |
| Clubs2: | Takarazuka Bunny |
| Clubs3: | AD Torrejón |
| Clubs4: | Levante UD |
| Nationalyears1: | 1996–2007 |
| Nationalteam1: | Spain |
| Nationalcaps1: | 48 |
| Nationalgoals1: | 1 |
| Nationalyears2: | 2006–2007 |
| Nationalteam2: | Basque Country |
| Nationalcaps2: | 2 |
| Nationalgoals2: | 0 |
Maider Castillo Muga (born 3 August 1976) is a Spanish former football defender, who most recently played for Levante UD of the Primera División.[1] She also played briefly in Japan's L. League for Takarazuka Bunny.[2]
She was a long-standing member of the Spain women's national football team,[3] and played at the 1997 European Championship. She retired from football in 2015.[4]