| Julio Luna Portal | |
| Full Name: | Julio César Luna Portal |
| Birth Date: | 20 December 1950 |
| Birth Place: | Lima, Department of Lima, Peru |
| Position: | Defender |
| Years1: | 1969–1973 |
| Clubs1: | Universitario de Deportes |
| Caps1: | 25 |
| Years2: | 1974–1975 |
| Clubs2: | Deportivo Municipal |
| Years3: | 1976–1980 |
| Clubs3: | Atlético Chalaco |
| Nationalyears1: | 1972–1973 |
| Nationalteam1: | Peru |
| Nationalcaps1: | 11 |
| Nationalgoals1: | 0 |
Julio César Luna Portal (born 20 December 1950), nicknamed Loco, is a Peruvian former footballer who played as a defender and played in the Brazil Independence Cup.
Luna began his career in 1969 with Universitario de Deportes until 1973 and would play in twenty-five matches with two of them being during the 1972 Copa Libertadores finals.[1] In the 1974–1975 season, he played for Deportivo Municipal and later with Atlético Chalaco between 1976 and 1980, participating in the 1980 Copa Libertadores.[2]
Luna briefly played in the Peru national football team with 11 appearances along with playing in the Brazil Independence Cup.[3] His debut would be on 6 June 1972 in a friendly against Colombia which would end in a draw and his last match would be on 13 May 1973, after Peru lost in its second match against Chile during the 1974 FIFA World Cup Qualifiers.[4] [5]