The 1976 Cologne Cup, was a men's tennis tournament played on indoor carpet courts in Cologne, West Germany that was part of the 1976 Commercial Union Assurance Grand Prix circuit and categorized as a One Star event.

It was the inaugural edition of the tournament and was held from 1 November through 6 November 1976.

First-seeded Jimmy Connors won the singles title and the accompanying $10,000 first-prize money Jimmy Connors defeated Frew McMillan 6–2, 6–3 Bob Hewitt / Frew McMillan defeated Colin Dowdeswell / Mike Estep 6–1, 3–6, 7–6