- Jul 1 International Geophysical Year begins (until Dec 31, 1958)
- Jul 1 WRLP TV channel 32 in Greenfield/Keene/Brat, MA (IND) 1st broadcast
- Jul 2 1st submarine designed to fire guided missiles launched, Grayback
- Jul 2 Pope Pius XII publishes encyclical Le pelerinage De Lourdes
- Jul 4 Dutch 2nd Chamber accepts temporary tax increase
Tennis Open
Jul 5 Wimbledon Men's Tennis: Lew Hoad successfully defends in crown beating fellow Australian Ashley Cooper 6-2, 6-1, 6-2
Lew Hoad
Ashley Cooper
- Jul 5 England cricket batsman Tom Graveney scores a brilliant 258 in the drawn 3rd Test v West Indies at Trent Bridge
- Jul 5 Wimbledon Women's Tennis: Althea Gibson becomes the first black female athlete to win Wimbledon beating Darlene Hard 6-3, 6-2
- Jul 5 British Open Golf, St Andrews: Bobby Locke of South Africa wins his 4th Open by 3 from Australian Peter Thomson
Music Concert
Jul 6 John Lennon (16) & Paul McCartney (15) meet for 1st time as Lennon's rock group Quarrymen perform at a church dinner
John Lennon
Event of Interest
Jul 6 Harry S. Truman Library forms in Independence, Missouri
Harry Truman
Conference of Interest
Jul 8 First Pugwash Conference, the "Thinkers Lodge" held on nuclear disarmament at Pugwash, Nova Scotia, Canada, founded by Joseph Rotblat and hosted by Cyrus Eaton
Cyrus Eaton
Event of Interest
Jul 12 1st President to fly in helicopter-Dwight Eisenhower
Dwight D. Eisenhower
Event of Interest
Jul 16 US Marine Major John Glenn sets transcontinental speed record (03:28:08)
John Glenn
- Jul 19 1st rocket with nuclear warhead fired, Yucca Flat, Nevada
- Jul 19 US performs nuclear Test at Nevada Test Site
- Jul 20 44th Tour de France won by Jacques Anquetil of France
- Jul 21 1st black to win a major US tennis tournament (Althea Gibson)
- Jul 21 39th PGA Championship: Lionel Hebert at Miami Valley GC Dayton Ohio
- Jul 21 Marilynn Smith/Fay Crocker wins Hot Springs 4-Ball Golf Tournament
- Jul 24 KTVC TV channel 6 in Ensign, KS (CBS) begins broadcasting
- Jul 24 US performs nuclear Test at Nevada Test Site
- Jul 25 Monarchy in Tunisia abolished in favor of a republic
- Jul 25 Peter Loader takes a cricket hat-trick for England v WI at Headingley
- Jul 25 US performs nuclear Test at Nevada Test Site
Event of Interest
Jul 26 Mickey Mantle hits career HR # 200
Mickey Mantle
TV Show Appearance
Jul 28 Jerry Lee Lewis makes his 1st TV appearance (Steve Allen Show)
Jerry Lee Lewis
Steve Allen
- Jul 28 Mickey Wright wins LPGA Wolverine Golf Open
- Jul 28 White Sox' James Landis struck out 5 times in a game
- Jul 28 Heavy rain and a mudslide in Isahaya, western Kyūshū, Japan, kill 992.
Boxing Title Fight
Jul 29 Floyd Patterson TKOs Tommy Jackson in 10 for heavyweight boxing title
Floyd Patterson