The 2005 Tour Down Under was the seventh edition of the Tour Down Under stage race.

It took place from 18 January to 23 January in and around Adelaide, South Australia.

This particular edition was won by Luis León Sánchez, who rode for the Liberty Seguros–Würth[1] 18 January 2005 – Adelaide – Adelaide, 50 km Stage and General Classification after Stage 1 19 January 2005 – Salisbury to Tanunda, 150 km Stage 2 result 20 January 2005 – Glenelg to Victor Harbor, 139 km Stage 3 result 21 January 2005 – Unley to Hahndorf, 152 km Stage 4 result 22 January 2005 – Willunga to Willunga, 147 km Stage 5 result 23 January 2005 – Adelaide to Adelaide, 81 km Stage 6 result