The 2011 Senior Open Championship was a senior major golf championship and the 25th Senior Open Championship, held on 21–24 July at Walton Heath Golf Club in Walton on the Hill, Surrey, England, United Kingdom.

[1] Russ Cochran won two strokes ahead of Mark Calcavecchia.

Defending champion Bernhard Langer finished tied 12th, eight strokes behind the winner.

[2][3][4] The Walton Heath Golf Club, founded in 1903 and situated in Walton-on-the-Hill, Surrey, England, southwest of London, had previously hosted the 1981 Ryder Cup.

18-hole stroke play qualifying rounds were held on three venues on Monday, 18 July, for players who were not already exempt.