1981 Fischer-Grand Prix
Date	19–25 October
Edition	7th
Category	Grand Prix
Draw	48S / 24D
Prize money	$100,000
Surface	Hard / indoor
Location	Vienna, Austria
Venue	Wiener Stadthalle
Champions
Singles
Ivan Lendl[1]
Doubles
Steve Denton / Tim Wilkison[2]
← 1980 · Vienna Open · 1982 →

The 1981 Fischer-Grand Prix was a men's tennis tournament played on indoor hard courts at the Wiener Stadthalle in Vienna in Austria that was part of the 1981 Volvo Grand Prix. It was the seventh edition of the tournament and was held from 19 October until 25 October 1981. First-seeded Ivan Lendl won the singles title.

Finals

Singles

Ivan Lendl defeated Brian Gottfried 1–6, 6–0, 6–1, 6–2

• It was Lendl's 7th singles title of the year and the 14th of his career.

Doubles

Steve Denton / Tim Wilkison defeated Sammy Giammalva Jr. / Fred McNair 4–6, 6–3, 6–4

• It was Denton's 3rd title of the year and the 7th of his career. It was Wilkison's 2nd title of the year and the 5th of his career.