Lucas Hamilton (born 12 February 1996) is an Australian cyclist, who currently rides for UCI WorldTeam Ineos Grenadiers.

Hamilton was named Best Young Rider for Australia's World Tour one-day classic and the Cadel Evans Great Ocean Road Race.

That same year, Lucas won his maiden World Tour win on stage four of Tirreno Adriatico.

Hamilton began his fourth professional year signing with Team BikeExchange.

He led the team at the 2021 Tour de France in their general classification campaign.