The 1974 Stadthalle Open was a men's tennis tournament played on indoor hard courts at the Wiener Stadthalle in Vienna in Austria that was part of the 1974 Commercial Union Assurance Grand Prix.

It was the inaugural edition of the tournament and was held from 28 October through 3 November 1974.

Unseeded Vitas Gerulaitis won the singles title.

[3] Vitas Gerulaitis defeated Andrew Pattison 6–4, 3–6, 6–3, 6–2 [1] Raymond Moore / Andrew Pattison defeated Bob Hewitt / Frew McMillan 6–4, 5–7, 6–4 [2]