| Marty Byrnes | |
| Position: | Small forward |
| Height Ft: | 6 |
| Height In: | 7 |
| Weight Lb: | 215 |
| Number: | 45, 12, 7, 45, 11 |
| Birth Date: | 30 April 1956 |
| Birth Place: | Syracuse, New York |
| Nationality: | American |
| High School: | Pittsford Sutherland (Pittsford, New York) |
| College: | Syracuse (1974–1978) |
| Draft Year: | 1978 |
| Draft Round: | 1 |
| Draft Pick: | 19 |
| Draft Team: | Phoenix Suns |
| Career Start: | 1978 |
| Career End: | 1988 |
| Team1: | Phoenix Suns |
| Team2: | New Orleans Jazz |
| Team3: | Los Angeles Lakers |
| Team4: | Dallas Mavericks |
| Years5: | 1981–1982 |
| Team5: | Rochester Zeniths |
| Team6: | Indiana Pacers |
| Years7: | 1983–1984 |
| Team7: | Scaligera Verona |
| Years8: | 1984–1986 |
| Team8: | Libertas Brindisi |
| Years9: | 1986–1987 |
| Team9: | Dietor Bologna |
| Years10: | 1987–1988 |
| Team10: | Charleston Gunners |
| Highlights: |
|
| Stats League: | NBA |
| Stat1label: | Points |
| Stat1value: | 1,495 (5.7 ppg) |
| Stat2label: | Rebounds |
| Stat2value: | 586 (2.2 rpg) |
| Stat3label: | Assists |
| Stat3value: | 409 (1.6 apg) |
| Bbr: | byrnema01 |
Martin William Byrnes (born April 30, 1956) is a retired American professional basketball player.
Born in Syracuse, New York, a 6'7" forward from Syracuse University, Byrnes played four seasons (1978–1981; 1982–1983) in the National Basketball Association (NBA) as a member of the Phoenix Suns, New Orleans Jazz, Los Angeles Lakers, Dallas Mavericks, and Indiana Pacers. He averaged 5.7 points per game in his NBA career and won an NBA Championship with the Lakers in 1980.