The 2018 Tour Down Under was a road cycling stage race, that took place between 16 and 21 January 2018 in and around Adelaide, South Australia.

However, Lotto–Soudal withdrew Bjorg Lambrecht from the race following an error with the UCI's anti-doping procedures,[9] while Team Sky lost Kristoffer Halvorsen following a crash in the closing metres of the People's Choice Classic, which resulted in a fractured hand.

[12] Other previous winners in the field were Luis León Sánchez (Astana), Lotto–Soudal rider André Greipel, Tom-Jelte Slagter of Team Dimension Data, and Mitchelton–Scott's Cameron Meyer.

[13] UCI WorldTeams Wildcard teams The route of the 2018 Tour Down Under was announced at the beginning of July 2017 and centred around the city of Adelaide in South Australia.

[15] Two days before the start of the Tour, there was a flat criterium race, the People's Choice Classic, which took place in Rymill Park and which was suited for the sprinters.

[17][18] The opening stage started in Port Adelaide, which hosted the race for the first time since the inaugural Tour Down Under in 1999.

[37] In addition, there was a combativity award given after each stage to the rider(s) considered, by a jury, to have "instigated the most attacks, breakaways or assisted their teammates to the best advantage".