Ajax (Sophocles), one of the seven surviving plays by the ancient Greek tragedian Sophocles

AFC Ajax, a football club from Amsterdam, The Netherlands

Martian Manhunter, a comic superhero called Ajax in Brazil and Portugal

Ajax (toilet), an early flush toilet invented in England in 1596

Ajax Duckman, a character in the animated television series Duckman

Ajax (The Warriors), a member of The Warriors gang.

Operation Ajax, a 1953 Anglo-American covert operation to overthrow the government of Iran

Ajax (programming), a technique used in web application development

Ajax, Ontario, Canada

Ajax the Great as a well known hero from the Trojan war and son of Telamon

Ajax (1927 locomotive), a LMS Royal Scot Class express locomotive, in service 1927-1962

Apatosaurus ajax, the type species of the Apatosaurus genus of sauropod dinosaurs

Ajax framework, a framework for the Ajax technique

Ajax Cape Town, a South African association football club

Ajax (comics), the name of two fictional characters from the Marvel Universe

Ajax Calkins, a character in Destiny's Orbit and Destination Saturn by Donald Wollheim

Ajak, another Marvel Comics character, a member of the Eternals, sometimes known as "Ajax the Greater"

Ajax (missionary), Arian missionary who converted the pagan Suevi c. 466

Ajax (1860 locomotive), one of the eight South Devon Railway Dido class steam locomotives, in service 1860-1884

Rabat Ajax, a Maltese football club

Ajax (cleanser), a household cleaner

FC Ajax Lasnamäe, an Estonian football club

1404 Ajax, an asteroid

Ajax (DJ), Australian Electro mashup DJ

Aias Salaminas F.C., a football club based in Salamina, Greece birthplace of Ajax the Telamonian.

HMS Ajax, several ships of the Royal Navy

AjaX, The Pop Culture Suicides keyboardist

Ajax (automobile), Nash Motors, 1925–1926, U.S.

Aspen Mountain (Colorado), also known as Ajax Mountain

Ajax (horse), a champion Australian racehorse of the 1930s

Ajax (arcade game), a 1987 shoot 'em up arcade game released by Konami

Ajax America, also known as Ajax Orlando, an American soccer team from Orlando, Florida

Ajax (Disney), a fictional company (the Disney equivalent of Looney Tunes' Acme Corporation)

Ajax Sportman Combinatie (ASC), a cricket and football club in Leiden, The Netherlands

Ajax (1906 automobile), Aigner, Switzerland

Ajax Records (Quebec) (1921 - 1926), a North American record company

Ajax Starglider, an American hip-hop artist from the group Future Shock

USS Ajax, several ships of the United States

Ajax (1913 automobile), Briscoe, France

Ajax Kenitra, a Moroccan futsal (indoor football) club

Ajax (1914 automobile), Seattle, Washington, U.S.

Ajax (band), an electronic band from New York City

Ajax (1921 automobile), prototype, U.S.

Ajax Records (Chicago), Chicago based independent record label active in the later 20th century

Ajax the Lesser son of the king of Locris, and another hero in the Trojan war

AYaKS, a Soviet top secret aerospacecraft project