| Osmar Mares | |
| Fullname: | Osmar Mares Martínez[1] |
| Birth Date: | 17 June 1987 |
| Birth Place: | Torreón, Mexico |
| Position: | Left-back |
| Years1: | 2006–2015 |
| Years2: | 2010–2011 |
| Years3: | 2014–2015 |
| Years4: | 2015–2019 |
| Years5: | 2017–2019 |
| Years6: | 2018–2019 |
| Clubs1: | Santos Laguna |
| Clubs2: | → San Luis (loan) |
| Clubs3: | → América (loan) |
| Clubs4: | América |
| Clubs5: | → Veracruz (loan) |
| Clubs6: | → Necaxa (loan) |
| Caps1: | 125 |
| Caps2: | 26 |
| Caps3: | 23 |
| Caps4: | 47 |
| Caps5: | 35 |
| Caps6: | 4 |
| Goals1: | 0 |
| Goals2: | 2 |
| Goals3: | 0 |
| Goals4: | 0 |
| Goals5: | 1 |
| Goals6: | 0 |
| Nationalyears1: | 2007 |
| Nationalteam1: | Mexico U20 |
| Nationalcaps1: | 2 |
| Nationalgoals1: | 1 |
Osmar Mares Martínez (born 17 June 1987) is a Mexican former professional footballer who played as a left-back. Mares has been capped for the Mexico national team at the U-20 level, and played in the 2007 FIFA U-20 World Cup in Canada.
He played for most of his career in Santos Laguna, starting from 2006, and ending in 2015, when Club América purchased him after a year loan. Other than Santos and America, he also had a stint with San Luis in 2010. In February 2015, Mares scored his first goal for America in a Concacaf Champions League quarter final match against Saprissa, in which America won 2–0.
Santos Laguna
Clausura 2012
América
Apertura 2014