Trojan can refer to:

• A citizen of the city of Troy (Ilium) as described by Homer
• T-28 Trojan, a US military trainer aircraft
• Trojan asteroid, an asteroid in about the same orbit as a planet (usually Jupiter) and about 60° ahead or behind.
• Trojan (automobile), a British car manufacturer
• Trojan (band), a heavy metal band
• Trojan Battery, a battery manufacturer
• Trojan (condoms), a brand of condoms
• Trojan horse (computing), a type of malicious software
• Trojan moon, a moon occupying an equilateral Lagrangian point, primarily Saturn system
• Trojan Nuclear Power Plant, a decommissioned nuclear power plant in Rainier, Oregon
• Trojan Records, a British music record label
• Trojan, South Africa, a suburb of Johannesburg, South Africa
• Trojan UV, An ultraviolet water treatment company
• Trojan (video game), a video game released by Capcom for the NES
• Trojan war
• Clarenceville Trojans, the sports team of Clarenceville School District
• A member of one of the various sports teams at the University of Southern California
• A type of Skinhead, named after the Trojans Record label
• One of the 4 types of character-classes that one can choose in the MMORPG Conquer Online
• Aermacchi AL.60, an Italian utility aircraft commonly called the AL.60F Trojan
• Trojan, an 0-4-0ST preserved in the Great Western Railway

Trojans | Trojaner | Trójan | Troijalainen