- Jul 4 Emile Mpenza, Belgian footballer, born in Zellik, Belgium
- Jul 4 Tatyana Jecmenica, Serbian tennis star (1995 Futures-Novi Sad), born in Novi Sad, Serbia
- Jul 6 Kevin Senio, New Zealand rugby player, born in Calgary, Alberta, Canada
- Jul 7 Leonardo Morales, Venezuelan soccer goalkeeper (26 caps; Carabobo, Zulia), born in El Tigre, Venezuela
- Jul 13 Ryan Ludwick, American baseball player
- Jul 15 Miguel Olivo, Dominican baseball player
- Jul 18 Ben Sheets, American baseball player
- Jul 18 Shane Horgan, Irish rugby player
- Jul 20 Jennifer Grubb, American soccer defender (12 caps; Washington Freedom), born in Elkhart Indiana
- Jul 20 Pavel Datsyuk, Russian ice hockey player
- Jul 20 Tamsyn Lewis, Australian athlete
- Jul 20 Will Solomon, American basketball player
- Jul 21 Gary Teale, Scottish football player and coach, born in Glasgow, Scotland
- Jul 21 Kyoko Iwasaki, Japanese swimmer (Olympic gold 200m breaststroke 1992), born in Numazu, Japan
- Jul 22 Dennis Rommedahl, Danish footballer
- Jul 22 Runako Morton, West Indian cricket batsman (15 Tests, 4 x 50, HS 70no; Leeward Islands, Trinidad & Tobago), born in Gingerland, Saint Kitts and Nevis (d. 2012)
- Jul 23 Stuart Elliott, Northern Irish footballer, born in Belfast, Northern Ireland
- Jul 24 Andy Irons, American surfer (ASP World Champion 2002-04), born in Kauai, Hawaii (d. 2010)
- Jul 25 Gerard Warren, American football player, born in Lake City, Florida
- Jul 31 Justin Wilson, English auto racer (International Formula 3000 C'ship; Champ Car Series 4 wins), born in Sheffield, South Yorkshire (d. 2015)
About July 1978
How Old? 45 years old
Generation: Generation X
Leap Year: No
Baseball Players
Basketball Stars
Boxers
Footballers
NFL Stars
Tennis Champions