The 1978 Porsche Tennis Grand Prix was a women's singles tennis tournament played on indoor carpet courts at the Tennis Sporthalle Filderstadt in Filderstadt in West Germany.

The event was part of the A[a] category of the 1978 Colgate Series.

It was the inaugural edition of the tournament and was held from 23 October through 29 October 1978.

[2] First-seeded Tracy Austin won the singles title, her first as a professional, and earned $6,000 first-prize money as well as a Porsche 924.

[2][1] Tracy Austin defeated Betty Stöve 6–3, 6–3 Tracy Austin / Betty Stöve defeated Mima Jaušovec / Virginia Ruzici 6–3, 6–2