2005 Hamburg Masters
Date	9–16 May
Edition	99th
Category	ATP Masters Series
Draw	64S / 24D
Prize money	$2,200,000
Surface	Clay / outdoor
Location	Hamburg, Germany
Venue	Rothenbaum Tennis Center
Champions
Singles
Roger Federer[1]
Doubles
Jonas Björkman / Max Mirnyi[2]
← 2004 · Hamburg Masters · 2006 →

The 2005 Hamburg Masters was a tennis tournament played on outdoor clay courts. It was the 99th edition of the Hamburg Masters, and was part of the ATP Masters Series of the 2005 ATP Tour. It took place at the Rothenbaum Tennis Center in Hamburg, Germany, from 9 May through 16 May 2005. First-seeded and defending champion Roger Federer won the singles title.

Finals

Singles

Roger Federer defeated Richard Gasquet, 6–3, 7–5, 7–6^(7–4)

• It was Federer's 6th title of the year, and his 28th overall. It was his 3rd Masters title of the year, and his 7th overall. It was his third victory at the event after winning in 2002 and 2004.

Doubles

Jonas Björkman / Max Mirnyi defeated Michaël Llodra / Fabrice Santoro, 6–2, 6–3