Tricostus is an ancient Roman cognomen. Notable people with the name include:
Aulus Verginius Tricostus Caeliomontanus (consul 494 BC), Roman politician Aulus Verginius Tricostus Caeliomontanus (consul 469 BC), Roman politician Aulus Verginius Tricostus Rutilus, Roman consul in 476 BC Lucius Verginius Tricostus Esquilinus (), Roman politician Opiter Verginius Tricostus (died 486 BC?), Roman consul in 502 BC Opiter Verginius Tricostus Esquilinus, Roman consul in 478 BC Proculus Verginius Tricostus, Roman consul in 435 BC and possibly 434 BC Proculus Verginius Tricostus Rutilus, Roman consul in 486 BC Titus Verginius Tricostus Caeliomontanus (consul 496 BC), Roman consul Titus Verginius Tricostus Caeliomontanus (consul 448 BC), Roman consul Titus Verginius Tricostus Rutilus (died 463 BC), Roman consul