- May 1 Inês Henriques, Portuguese race walker (World C'ships gold 50k walk 2017), born in Santarém, Portugal
- May 2 Brad Richards, Canadian ice hockey center (Stanley Cup 2004 TB Lightning, 2015 Chicago Blackhawks; Conn Smythe Trophy 2015), born in Murray Harbour, Prince Edward Island, Canada
- May 2 Miloš Glogovac, Serbian football player, born in Serbia
- May 2 Pierre-Luc Gagnon, Canadian skateboarder, born in Boucherville, Quebec, Canada
- May 2 Tim Borowski, German soccer midfielder (33 caps; Werder Bremen, Bayern Munich), born in Neubrandenburg, Germany
- May 2 Troy Murphy, American basketball player, born in Morristown, New Jersey
- May 2 Zat Knight, English soccer centre back (2 caps; Fulham, Bolton Wanderers), born in Solihull, England
- May 5 DerMarr Johnson, American basketball player, born in Washington, D.C.
- May 5 Yossi Benayoun, Israeli footballer (Israel national team captain), born in Dimona, Israel
- May 6 Brooke Bennett, American swimmer (3 Olympic golds), born in Tampa, Florida
- May 6 Mario Stojić, Croatian basketball player
- May 6 Ricardo Oliveira, Brazilian footballer (Clube Atlético Mineiro), born in São Paulo, Brazil
- May 7 Johan Kenkhuis, Dutch swimmer
- May 9 Grant Hackett, Australian swimmer (Olympicss - gold, 2000 & 2004), born in Southport, Queensland
- May 9 Tony Schmidt, German racing driver
- May 14 Eugene Martineau, Dutch decathlete
- May 14 Hugo Southwell, Scottish rugby union footballer
- May 14 Zdeněk Grygera, Czech footballer
- May 15 Josh Beckett, American baseball player
- May 16 Michael Ryan, American ice hockey player and coach (Springfield Thunderbirds), born in Boston, Massachusetts
- May 17 Stéphane Robert, French professional tennis player, born in Montargis, France
- May 19 Tony Hackworth, English footballer
- May 20 Austin Kearns, American Baseball player
- May 23 Theofanis Gekas, Greek footballer
- May 25 David Navarro, Spanish footballer, born in Sagunto, Spain
- May 28 Miguel Pérez, Spanish footballer
- May 30 Steven Gerrard, English footballer
About May 1980
How Old? 43 years old
Generation: Generation X
Leap Year: Yes
Baseball Players
Basketball Stars
Boxers
Footballers
NFL Stars
Tennis Champions