The 1991 World Seniors Championship was a professional snooker tournament that took place from 18 to 22 September 1991 at Trentham Gardens in Stoke-on-Trent, England.

Cliff Wilson won his first professional title, aged 57, by defeating Eddie Charlton by 5 frames to 4 in the final, after trailing 2–4.

[1] Six-time world champion Ray Reardon declined an invitation to compete, and was replaced in the draw by Murdo MacLeod.

[1][4] The event was sanctioned by the World Professional Billiards and Snooker Association (WPBSA),[4] and held from 18 to 22 September 1991 at Trentham Gardens in Stoke-on-Trent.

[2][5][6] The breakdown of prize money is shown below:[4] The first day of play saw three 5–0 whitewashes: by Terry Griffiths, who eliminated the oldest player in the field, 78-year-old Fred Davis; by Cliff Wilson against Rex Williams; and by Eddie Charlton over John Spencer.

[1][7][8] Alex Higgins, whose one year ban from playing snooker had elapsed six weeks previously, led Silvino Francisco 3–2 after compiling a 108 break in the fifth frame.

[1] McLeod defeated John Virgo, who was ranked 41 places above him, 5–4, and Colin Roscoe eliminated Cliff Thorburn 5–3.

[4] In the same issue, Wilson was described as "handicapped by shoulder and eyesight problems, [he] remains one of the best single ball potters in the game".

[4] One of the oldest competitors in the competition, at 57,[13] Wilson's prize money of £16,000 was more than twice his previous highest earnings from a tournament, £7,500 for reaching the quarter-finals of the 1987 Mercantile Credit Classic.