| Event: | Men's 50 metre backstroke S5 |
| Games: | 2012 Summer |
| Venue: | London Aquatics Centre |
| Dates: | 6 September |
| Competitors: | 18 |
| Nations: | 14 |
| Gold: | Daniel Dias |
| Goldnpc: | BRA |
| Silver: | He Junquan |
| Silvernpc: | CHN |
| Bronze: | Zsolt Vereczkei |
| Bronzenpc: | HUN |
The men's 50 metre backstroke S5 event at the 2012 Paralympic Games took place on 6 September, at the London Aquatics Centre.
Three heats were held, each with six swimmers. The swimmers with the eight fastest times advanced to the final.
| Rank | Lane | Name | Nationality | Time | Notes |
|---|---|---|---|---|---|
| 1 | 4 | Zsolt Vereczkei | 38.86 | Q | |
| 2 | 2 | Jonas Larsen | 42.56 | Q | |
| 3 | 5 | Anthony Stephens | 43.60 | ||
| 4 | 3 | Francisco Avelino | 44.89 | ||
| 5 | 6 | Roy Perkins | 47.37 | ||
| 6 | 7 | Matija Grebenic | 49.36 | ||
| Rank | Lane | Name | Nationality | Time | Notes |
|---|---|---|---|---|---|
| 1 | 4 | He Junquan | 37.02 | Q | |
| 2 | 2 | Vo Thanh Tung | 42.26 | Q | |
| 3 | 5 | Zul Amirul Sidi Bin Abdullah | 43.00 | Q | |
| 4 | 6 | Ricardo Ten | 43.07 | ||
| 5 | 3 | James Scully | 45.27 | ||
| 6 | 7 | Miguel Luque | 49.36 | ||
| Rank | Lane | Name | Nationality | Time | Notes |
|---|---|---|---|---|---|
| 1 | 4 | Daniel Dias | 36.29 | Q | |
| 2 | 5 | Andrew Mullen | 39.69 | Q | |
| 3 | 3 | Cameron Leslie | 42.88 | Q, OC | |
| 4 | 6 | Beytullah Eroglu | 43.11 | ||
| 5 | 7 | Ariel Quassi | 49.45 | ||
| 2 | Jamery Siga | DSQ | |||
| Rank | Lane | Name | Nationality | Time | Notes | |
|---|---|---|---|---|---|---|
| 4 | Daniel Dias | 34.99 | WR | |||
| 5 | He Junquan | 36.41 | ||||
| 3 | Zsolt Vereczkei | 38.92 | ||||
| 4 | 6 | Andrew Mullen | 39.54 | |||
| 5 | 1 | Cameron Leslie | 42.40 | OC | ||
| 6 | 2 | Vo Thanh Tung | 42.59 | |||
| 7 | 7 | Jonas Larsen | 42.93 | |||
| 8 | 8 | Zul Amirul Sidi Bin Abdullah | 43.21 |