Tomas Van Den Spiegel (alternate spelling: Thomas, born 10 July 1978 in Ghent, Belgium) is a Belgian former professional basketball player and the current president of ULEB.

In 2001, he was named the Belgian Player of the Year, and he then signed a three-year contract with the top-tier level Italian LBA League club Fortitudo Bologna, where he was a EuroLeague runner-up in 2004.

After a season-and-a-half with Virtus Roma, he chose the Russian club CSKA Moscow, as his next career destination.

After a couple of short stints, one in Poland with Prokom Trefl Sopot, and one in Ukraine with Azovmash Mariupol, he played two seasons with Real Madrid.

Van Den Spiegel was also a member of the senior men's Belgian national basketball team.