| Women 100m Backstroke V Swimming World Championship 1986 Madrid, Spain - Tuesday, 19th August - Gold Medal: Betsy Mitchwll, United States |
| Final | | time | | gap | L | ag | pts | | 1. Betsy Mitchell |  United States | 1:01.74 | | | 4 | 20 | 881 | | 2. Kathrin Zimmermann |  East Germany | 1:02.17 | | +0.43s | 2 | 19 | 863 | | 3. Natalya Shibayeva |  Soviet Union | 1:02.25 | | +0.51s | 3 | 18 | 860 | | 4. Cornelia Sirch | East Germany | 1:02.29 | | +0.55s | 5 | 19 | 858 | | 5. Svenja Schlicht |  West Germany | 1:03.17 | | +1.43s | 6 | 19 | 823 | | 6. Carmen Bunaciu |  Romania | 1:03.44 | | +1.70s | 8 | 24 | 812 | | 7. Anne Mahoney | United States | 1:03.50 | | +1.76s | 1 | | 810 | | 8. Jolanda De Rover |  Netherlands | 1:03.66 | | +1.92s | 7 | 22 | 804 |
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| Final B | | time | | gap | L | ag | | 9. Aneta Patrascoiu | Romania | 1:03.49 | | | 4 | 18 | | 10.Silvia Poll |  Costa Rica | 1:03.68 | | +0.19s | 5 | 15 | | 11.Bistra Gospodinova |  Bulgaria | 1:04.09 | | +0.60s | 6 | 20 | | 12.Marianne Muis | Netherlands | 1:04.44 | | +0.95s | 2 | 18 | | 13.Kathy Read |  Great Britain | 1:04.52 | | +1.03s | 8 | 17 | | 14.Marion Aizpors | West Germany | 1:04.68 | | +1.19s | 7 | 25 | | 15.Simone Hindmarsh | Great Britain | 1:04.77 | | +1.28s | 2 | | | 16.Lorenza Vigarani |  Italy | 1:04.81 | | +1.32s | 3 | 16 |
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Heats - Tuesday, 19th August |
| Best 8 times advanced to Final. Next 8 to Final B. |
| Heat 5 | | time | | gap | L | ag | Rk | | 1. Betsy Mitchell | United States | 1:01.71 | | | - | 20 | 1. | | 3. Natalya Shibayeva | Soviet Union | 1:02.99 | | +1.28s | - | 18 | 2. | | 11.Lorenza Vigarani | Italy | 1:04.87 | | +3.16s | - | 16 | 3. | | 14.Marion Aizpors | West Germany | 1:05.02 | | +3.31s | - | 25 | 4. | | 21.Pascale Choquet |  Canada | 1:06.36 | | +4.65s | - | | 5. | | 25.Eeva Ketola |  Finland | 1:08.03 | | +6.32s | - | | 6. | | 30.Ana C Rios |  Puerto Rico | 1:10.63 | | +8.92s | - | | 7. |
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| Heat 4 | | time | | gap | L | ag | Rk | | 2. Cornelia Sirch | East Germany | 1:02.83 | | +1.12s | - | 19 | 1. | | 7. Anne Mahoney | United States | 1:03.51 | | +1.80s | - | | 2. | | 15.Simone Hindmarsh | Great Britain | 1:05.12 | | +3.41s | - | | 4. | | 17.Dora Varga |  Hungary | 1:05.32 | | +3.61s | - | | 4. | | 28.Beatriz Villa |  Colombia | 1:10.21 | | +8.50s | - | | 5. | | 29.Monica Rezende |  Brazil | 1:10.40 | | +8.69s | - | 17 | 6. | | 34.Soumaya Koudri |  Algeria | 1:12.79 | | +11.08s | - | | 7.? |
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| Heat 3 | | time | | gap | L | ag | Rk | | 4. Svenja Schlicht | West Germany | 1:03.16 | | +1.45s | - | 19 | 1. | | 5. Kathrin Zimmermann | East Germany | 1:03.23 | | +1.52s | - | 19 | 2. | | 16.Kathy Read | Great Britain | 1:05.19 | | +3.48s | - | 17 | 3. | | 19.Sylvia Hume |  New Zealand | 1:05.79 | | +4.08s | - | 18 | 4. | | 23.Sylvie Closset |  Belgium | 1:07.80 | | +6.09s | - | | 5. | | 26.Ana Luisa Barros |  Portugal | 1:08.92 | | +7.21s | - | 16 | 6. | | 32.Lee-Yu Lan |  Chinese Taipei | 1:12.42 | | +10.71s | - | | 7. |
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| Heat 2 | | time | | gap | L | ag | Rk | | 9. Aneta Patrascoiu | Romania | 1:04.11 | | +2.40s | - | 18 | 1. | | 12.Bistra Gospodinova | Bulgaria | 1:04.92 | | +3.21s | - | 20 | 2. | | 13.Marianne Muis | Netherlands | 1:04.97 | | +3.26s | - | 18 | 3. | | 18.Georgina Parkes |  Australia | 1:05.55 | | +3.84s | - | 21 | 4. | | 22.Natalia Autric |  Spain | 1:07.41 | | +5.70s | - | 21 | 5. | | 31.Leticia Morales |  Argentina | 1:10.69 | | +8.98s | - | | 6. | | 33.Wang Chi | Chinese Taipei | 1:12.71 | | +11.00s | - | 16 | 7. |
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| Heat 1 | | time | | gap | L | ag | Rk | | 6. Jolanda De Rover | Netherlands | 1:03.27 | | +1.56s | - | 22 | 1. | | 8. Carmen Bunaciu | Romania | 1:03.72 | | +2.01s | - | 24 | 2. | | 10.Silvia Poll | Costa Rica | 1:04.21 | | +2.50s | - | 15 | 3. | | 20.Barb Mcbain | Canada | 1:06.20 | | +4.49s | - | | 4. | | 24.Mayra Kikuchi | Brazil | 1:07.82 | | +6.11s | - | | 5. | | 27.Rita Garay | Puerto Rico | 1:09.86 | | +8.15s | - | 15 | 6. | | 35.Viviana Solis | Costa Rica | 1:17.96 | | +16.25s | - | | 7. |
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