The 1991 Stella Artois Championships was a men's tennis tournament played on grass courts at the Queen's Club in London in the United Kingdom and was part of the World Series of the 1991 ATP Tour. It was the 89th edition of the tournament and was held from June 10 through June 17, 1991. Stefan Edberg won the singles event and Todd Woodbridge / Mark Woodforde won the doubles title.

Stefan Edberg defeated David Wheaton 6–2, 6–3

Todd Woodbridge / Mark Woodforde defeated Grant Connell / Glenn Michibata 6–4, 7–6