2005 Heineken Open
Date	10–17 January
Edition	38th
Category	International Series
Draw	32S / 16D
Prize money	$401,000
Surface	Hard / outdoor
Location	Auckland, New Zealand
Venue	ASB Tennis Centre
Champions
Singles
Fernando González[1]
Doubles
Yves Allegro / Michael Kohlmann[2]
← 2004 · ATP Auckland Open · 2006 →

The 2005 Heineken Open was a men's ATP tennis tournament held at the ASB Tennis Centre in Auckland, New Zealand. It was the 38th edition of the tournament and was held from 10 January to 17 January 2005 and played on outdoor hard courts. Fifth-seeded Fernando González won the singles title.

Finals

Singles

Fernando González defeated Olivier Rochus 6–4, 6–2

• It was González's 1st title of the year and the 6th of his career.

Doubles

Yves Allegro / Michael Kohlmann defeated Simon Aspelin / Todd Perry 6–4, 7–6^(7–4)

• It was Allegro's 1st title of the year and the 2nd of his career. It was Kohlmann's only title of the year and the 3rd of his career.