The 2008 ARAG World Team Cup was a tennis tournament play on outdoor clay courts. It was the 30th edition of the World Team Cup, and was part of the 250 series of the 2008 ATP Tour. It took place at the Rochusclub in Düsseldorf, Germany, from 18 May through 24 May 2008.
Argentina were the defending champions but they failed to advance beyond the group stage. Sweden defeated Russia in the final, by two rubbers to one for their fourth title. It was also their first title since 1995.