1978 Virginia Slims of Philadelphia – Singles

Chris Evert was the defending champion and successfully defended her title, by defeating Billie Jean King 6–0, 6–4 in the final.

Seeds
• # 🇺🇸 Chris Evert (champion)

• # 🇦🇺 Evonne Goolagong (withdrew)

• # Betty Stöve (quarterfinals)

• # 🇺🇸 Tracy Austin (quarterfinals)

• # 🇬🇧 Virginia Wade (semifinals)

• # 🇺🇸 Billie Jean King (final)

• # 🇦🇺 Wendy Turnbull (quarterfinals)

• # 🇦🇺 Kerry Reid (quarterfinals)