Star Awards 2005 is the 12th Star Awards ceremony, held on 4 December 2005. It was part of the annual Star Awards organised by MediaCorp for MediaCorp TV Channel 8. Following MediaCorp's merger with SPH MediaWorks on 1 January 2005, the nominees included artistes from the former SPH MediaWorks Channel U, many of whom were former employees of MediaCorp and its predecessor TCS. Channel U, now MediaCorp Channel U, aired the ceremony for the first time and began broadcasting at 7:30pm.

Prior to the actual ceremony, a separate awards ceremony and gala was held at the The Fullerton Hotel in which technical category awards and the Young Talent Award were given out.

The show lasted three hours and saw four artistes winning two awards each, namely Bryan Wong, Chen Hanwei, Huang Biren and Quan Yi Fong.

Fann Wong and Xie Shaoguang won the All-Time Favourites Award in a special category honouring artistes who have won in the popularity awards for ten years. Xie Shaoguang was in Malaysia during the awards ceremony, so he was not there to receive the award personally.