| Isidoro Díaz | |
| Fullname: | Isidoro Díaz Mejía |
| Birth Date: | 1938 2, df=yes |
| Birth Place: | Acatlán de Juárez, Jalisco, Mexico |
| Position: | Midfielder |
| Years1: | 1955–1968 |
| Years2: | 1968–1970 |
| Years3: | 1970–1971 |
| Years4: | 1971–1972 |
| Caps1: | ? |
| Goals1: | 58 |
| Nationalyears1: | 1960–1970 |
| Nationalteam1: | Mexico |
| Nationalcaps1: | 68 |
| Nationalgoals1: | 17 |
Isidoro Díaz Mejía (born 14 February 1938) is a Mexican former professional footballer who played as a midfielder.
Isidoro Díaz played most of his club career for Guadalajara, where he won 15 titles, including 7 league titles and the first ever edition of the CONCACAF Champions' Cup in 1962.
He represented Mexico in three World Cups (1962, 1966 and 1970). He made 68 appearances for the Mexico national team between 1960 and 1970.[1]
Guadalajara
1956–57, 1958–59, 1959–60, 1960–61, 1961–62 1963–64, 1965–1966
|- | 1. || March 19, 1960 || San José, Costa Rica || || 3–0 || Win || 1960 Panamerican Cup|- | 2. || June 26, 1960 || Mexico City, Mexico || || 3–1 || Win || Friendly|- | 3. || November 13, 1960 || Mexico City, Mexico || || 3–0 || Win || 1962 FIFA World Cup qualification|- | 4. || June 7, 1962 || Viña del Mar, Chile || || 3–1 || Win || 1962 FIFA World Cup|- | 5. || March 28, 1963 || Santa Ana, El Salvador || || 8–0 || Win || 1963 CONCACAF Championship|- | 6. || March 28, 1963 || Santa Ana, El Salvador || || 8–0 || Win || 1963 CONCACAF Championship|- | 7. || February 28, 1965 || San Pedro Sula, Honduras || || 1–0 || Win || 1966 FIFA World Cup qualification|-| 8. || March 12, 1965 || Mexico City, Mexico || || 2–0 || Win || 1966 FIFA World Cup qualification|- | 9. || March 28, 1965 || Guatemala City, Guatemala || || 2–0 || Win || 1965 CONCACAF Championship|- | 10. || May 7, 1965 || Mexico City, Mexico || || 8–0 || Win || 1966 FIFA World Cup qualification|- | 11. || May 7, 1965 || Mexico City, Mexico || || 8–0 || Win || 1966 FIFA World Cup qualification|- | 12. || May 7, 1965 || Mexico City, Mexico || || 8–0 || Win || 1966 FIFA World Cup qualification|- | 13. || October 6, 1968 || Puebla, Mexico || || 1–1 || Draw || Friendly|- | 14. || October 31, 1968 || Rio de Janeiro, Brazil || || 2–1 || Win || Friendly |- | 15. || February 15, 1970 || Mexico City, Mexico || || 1–1 || Draw || Friendly|- | 16. || April 22, 1970 || Mexico City, Mexico || || 1–1 || Draw || Friendly|- | 17. || April 29, 1970 || León, Mexico || || 4–2 || Win || Friendly|}