| Clubname: | Mariscal Nieto |
| Fullname: | Club Mariscal Nieto |
| Founded: | 1966 |
| Position: | Eliminated in the Departamental Stage |
| Leftarm1: | FFFF00 |
| Body1: | FFFF00 |
| Rightarm1: | FFFF00 |
| Shorts1: | 000000 |
| Socks1: | FFFF00 |
| Pattern B2: | _yellowsides |
| Pattern Sh2: | _yellow_stripes |
| Leftarm2: | 000000 |
| Body2: | 000000 |
| Rightarm2: | 000000 |
| Shorts2: | 000000 |
| Socks2: | 000000 |
Mariscal Nieto (Spanish mariscal marshal) is a Peruvian football club, playing in the city of Ilo, Moquegua, Peru.
Mariscal Nieto is one of the clubs with the greatest tradition in the city of Ilo, Moquegua.
The club was the 1985 departamental champion and played in the 1986 Torneo Descentralizado and 1991 Torneo Descentralizado.
Winners (8): 1980, 1984, 1987, 1989, 1994, 2001, 2002, 2014
Runner-up (3): 2004, 2016, 2022
Winners (8): 2002, 2004, 2010, 2014, 2016, 2018, 2019, 2022
Runner-up (3): 2009, 2013, 2017
Winners (12): 1979, 1980, 1984, 2001, 2009, 2010, 2013, 2014, 2016, 2017, 2018, 2022
Runner-up (1): 2019