1998 WTA Tour Championships

The 1998 WTA Tour Championships was the end-of-year WTA Tour championship. The top 16 women on the 1998 WTA Tour qualified to participate.
==Singles==
Monica Seles was the defending champion, but lost in the quarterfinals to Serena Williams. Serena's sister, Venus Williams, won the title, defeating former champion Lindsay Davenport 4-6, 7-5, 6-2 in the final. 
===Seeds===
# Lindsay Davenport (Final)
# Martina Hingis (Quarterfinals)
# Jana Novotná (First Round)
# Arantxa Sanchez Vicario (First Round)
 Monica Seles (Quarterfinals) 
 Mary Pierce (First Round)
 Conchita Martinez (First Round)
 Nathalie Tauziat (Quarterfinals) 
===Draw===