Mechanicus

Mechanicus may refer to:


 * Philo of Byzantium (ca. 280 BC – ca. 220 BC), also known as Philo Mechanicus, an ancient Greek engineer and writer
 * Athenaeus Mechanicus, an ancient Greek author of a book on siegecraft, active 1st century BC
 * Warhammer 40,000: Mechanicus, a 2018 video game