| Event: | Men's 200 metre backstroke |
| Competition: | 2005 FINA World Championships |
| Dates: | 28 July 2005 (heats, semifinals) 29 July 2005 (final) |
| Competitors: | 47 |
| Nations: | 39 |
| Win Value: | 1:54.66 |
| Gold: | Aaron Peirsol |
| Goldnoc: | USA |
| Silver: | Markus Rogan |
| Silvernoc: | AUT |
| Bronze: | Ryan Lochte |
| Bronzenoc: | USA |
| Prev: | 2003 |
| Next: | 2007 |
See main article: Swimming at the 2005 World Aquatics Championships.
The men's 200 metre backstroke event at the 2005 World Aquatics Championships took place between 28 July - 29 July. Both the heats and semifinals were held on 28 July, with the heats being held in the morning session and the semifinals in the evening session. The final was held on 29 July.
Prior to the competition, the existing world and championship records were as follows.
| Name | Nationality | Time | Location | Date | |||
|---|---|---|---|---|---|---|---|
| World record | align=left | 1:54.74 | 12 July 2004 | ||||
| Championship record | align=left | 1:55.82 | 24 July 2003 |
The following records were established during the competition:
| Rank | Heat/Lane | Name | Nationality | Time | Notes |
|---|---|---|---|---|---|
| 1 | H6 L4 | 1:58.04 | qualified | ||
| 2 | H6 L2 | 1:59.03 | qualified | ||
| 3 | H4 L4 | 1:59.33 | qualified | ||
| 4 | H6 L6 | 1:59.78 | qualified | ||
| 5 | H5 L5 | 1:59.88 | qualified | ||
| 6 | H4 L3 | 1:59.97 | qualified | ||
| 7 | H5 L6 | 2:00.11 | qualified | ||
| 8 | H6 L5 | 2:00.27 | qualified | ||
| 9 | H6 L3 | 2:00.57 | qualified | ||
| 10 | H4 L5 | 2:01.03 | qualified | ||
| 11 | H5 L3 | 2:01.60 | qualified | ||
| 12 | H4 L2 | 2:01.69 | qualified | ||
| 13 | H4 L1 | 2:01.93 | qualified | ||
| 14 | H5 L4 | 2:02.00 | qualified | ||
| 15 | H5 L1 | 2:02.12 | qualified | ||
| 16 | H5 L7 | 2:02.27 | qualified | ||
| 17 | H5 L8 | 2:02.36 | |||
| 18 | H4 L6 | 2:02.64 | |||
| 19 | H5 L2 | 2:02.88 | |||
| 20 | H4 L7 | 2:02.89 | |||
| 21 | H6 L7 | 2:03.41 | |||
| 22 | H6 L1 | 2:04.00 | |||
| 23 | H6 L8 | 2:04.09 | |||
| 24 | H3 L4 | 2:04.15 | |||
| 25 | H4 L8 | 2:04.30 | |||
| 26 | H3 L5 | 2:04.61 | |||
| 27 | H3 L6 | 2:06.92 | |||
| 28 | H3 L1 | 2:09.63 | |||
| 29 | H3 L8 | 2:10.28 | |||
| 30 | H2 L5 | 2:11.04 | |||
| 31 | H2 L3 | 2:11.35 | |||
| 32 | H2 L7 | 2:11.96 | |||
| 33 | H2 L2 | 2:12.42 | |||
| 34 | H2 L1 | 2:12.84 | |||
| 35 | H3 L2 | 2:12.91 | |||
| 36 | H2 L8 | 2:13.46 | |||
| 37 | H2 L4 | 2:13.75 | |||
| 38 | H1 L4 | 2:15.04 | |||
| 39 | H1 L3 | 2:15.79 | |||
| 40 | H3 L7 | 2:17.29 | |||
| 41 | H2 L6 | 2:17.30 | |||
| 42 | H1 L8 | 2:19.15 | |||
| 43 | H1 L5 | 2:22.11 | |||
| 44 | H1 L6 | 2:22.28 | |||
| 45 | H1 L1 | 2:23.19 | |||
| 46 | H1 L2 | 2:23.29 | |||
| 47 | H1 L7 | 2:23.46 | |||
| Rank | Heat/Lane | Name | Nationality | Time | Notes |
|---|---|---|---|---|---|
| 1 | S2 L4 |  USA | 1:56.60 | q | |
| 2 | S2 L5 |  Austria | 1:57.16 | q | |
| 3 | S2 L3 | Romania | 1:58.03 | q | |
| 4 | S1 L6 | USA | 1:58.17 | q | |
| 5 | S1 L2 |  Russia | 1:58.60 | q | |
| 6 | S1 L5 |  Japan | 1:58.70 | q | |
| 7 | S1 L4 | Croatia | 1:58.74 | q | |
| 8 | S1 L3 | Japan | 1:58.91 | q | |
| 9 | S2 L2 |  Great Britain | 1:58.97 | ||
| 10 | S2 L6 | Slovenia | 1:59.10 | ||
| 11 | S1 L1 | Great Britain | 1:59.16 | ||
| 12 | S2 L7 |  France | 2:00.08 | ||
| 13 | S1 L7 | Germany | 2:00.88 | ||
| 14 | S2 L8 |  Israel | 2:01.58 | ||
| 14 | S2 L1 |  Turkey | 2:01.58 | ||
| 16 | S1 L8 |  Australia | 2:03.15 | ||
| Rank | Name | Nationality | Time | Notes |
|---|---|---|---|---|
| USA | 1:54.66 | WR | ||
| Austria | 1:56.63 | |||
| USA | 1:57.00 | |||
| 4 | Romania | 1:57.03 | ||
| 5 | Japan | 1:58.03 | ||
| 6 | Croatia | 1:58.28 | ||
| 7 | Russia | 1:59.02 | ||
| 8 | Japan | 1:59.34 | ||
Key: WR = World record