The Men's 100 metre backstroke S11 swimming event at the 2004 Summer Paralympics was competed on 25 September. It was won by Viktor Smyrnov, representing .
1st round
Qualified for next round
Heat 1 25 Sept. 2004, morning session Rank Athlete Time Notes1 1:12.51 2 1:14.46 3 1:16.28 4 1:18.11 5 1:26.72
Heat 2 25 Sept. 2004, morning session Rank Athlete Time Notes1 1:14.67 2 1:17.08 3 1:18.05 4 1:18.57 5 1:22.49
Final round
25 Sept. 2004, evening session Rank Athlete Time Notes 1:11.29 1:11.71 1:12.11 4 1:12.84 5 1:16.15 6 1:16.45 7 1:16.84 8 1:19.24
References