| Final A | Team | time | -)time | L | React. | 50m | 100m | 150m | | 1. Catherine Breed | --- | 2:00.08 | | 4 | 0.80s | 6. | 29.27s | 2. | 59.74s | 1. | 1:30.09 | | 2. Chelsea Beth Nauta | --- | 2:00.62 | 0.54s | 3 | | 4. | 29.20s | 2. | 59.74s | 2. | 1:30.44 | | 3. Andreina Pinto | --- | 2:00.79 | 0.71s | 6 | 0.84s | 2. | 29.09s | 4. | 1:00.23 | 3. | 1:30.97 | | 4. Liliana Ibanez | --- | 2:02.90 | 2.82s | 5 | | 7. | 29.32s | 5. | 1:00.57 | 5. | 1:32.07 | | 5. Yanel Pinto | --- | 2:03.92 | 3.84s | 2 | | 8. | 29.48s | 8. | 1:01.29 | 7. | 1:33.14 | | 6. Jessica Cavalheiro | --- | 2:04.13 | 4.05s | 7 | 0.72s | 5. | 29.26s | 6. | 1:00.61 | 6. | 1:32.61 | | 7. Tatiana Barbosa | --- | 2:04.20 | 4.12s | 8 | 0.80s | 1. | 28.98s | 1. | 59.67s | 4. | 1:31.10 | | 8. Jennifer Beckberger | --- | 2:04.72 | 4.64s | 1 | 0.67s | 3. | 29.17s | 7. | 1:01.01 | 8. | 1:33.28 |
| Final B | Team | time | -)time | L | React. | 50m | 100m | 150m | | 9. Paige Schultz | --- | 2:04.96 | | 6 | 0.77 | 2. | 29.52 | 3. | 1:01.25 | 2. | 1:33.45 | | 10.Virginia Bardach | --- | 2:05.35 | 0.39 | 4 | | 3. | 29.53 | 1. | 1:01.08 | 1. | 1:33.35 | | 11.Alexia Benitez | --- | 2:06.15 | 1.19 | 5 | | 1. | 29.48 | 2. | 1:01.13 | 3. | 1:33.56 | | 12.Andrea Cedron | --- | 2:06.81 | 1.85 | 3 | | 4. | 29.91 | 4. | 1:02.02 | 4. | 1:34.68 | | 13.Daniela Reyes | --- | 2:15.07 | 10.11 | 2 | | 5. | 31.03 | 5. | 1:04.86 | 5. | 1:39.93 | | -. Britany Van Lange | --- | DNS | | 7 | |
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| World record: | | Pan American Games record: |
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| Qualification: | | Standard A: 2:05.0 | | Standard B: 2:08.8 |
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| Heats | Team | time | -)time | L | React. | 50m | 100m | 150m | Heat | | 1. Catherine Breed | --- | 2:00.81 | | 4 | 0.83s | 2. | 28.68s | 1. | 59.42s | 1. | 1:30.26 | Heat 2. | | 2. Liliana Ibanez | --- | 2:01.15 | 0.34s | 5 | | 3. | 29.10s | 3. | 1:00.00 | 2. | 1:30.78 | Heat 2. | | 3. Chelsea Beth Nauta | --- | 2:01.81 | 1.00s | 4 | 0.74s | 1. | 29.15s | 1. | 59.96s | 1. | 1:31.08 | Heat 1. | | 4. Andreina Pinto | --- | 2:03.15 | 2.34s | 3 | | 1. | 28.65s | 2. | 59.63s | 3. | 1:31.11 | Heat 2. | | 5. Yanel Pinto | --- | 2:04.38 | 3.57s | 6 | | 6. | 29.56s | 6. | 1:01.45 | 5. | 1:33.25 | Heat 2. | | 6. Jessica Cavalheiro | --- | 2:04.79 | 3.98s | 6 | | 4. | 29.49s | 4. | 1:01.45 | 3. | 1:33.31 | Heat 1. | | 7. Jennifer Beckberger | --- | 2:05.17 | 4.36s | 7 | 0.66s | 5. | 29.42s | 5. | 1:00.96 | 4. | 1:32.95 | Heat 2. | | 8. Tatiana Barbosa | --- | 2:05.86 | 5.05s | 5 | | 2. | 29.39s | 3. | 1:01.24 | 2. | 1:33.24 | Heat 1. | | 9. Virginia Bardach | --- | 2:05.99 | 5.18s | 2 | | 3. | 29.47s | 2. | 1:01.05 | 4. | 1:33.40 | Heat 1. | | 10.Alexia Benitez | --- | 2:07.30 | 6.49s | 2 | | 4. | 29.17s | 4. | 1:00.88 | 6. | 1:33.99 | Heat 2. | | 11.Andrea Cedron | --- | 2:08.36 | 7.55s | 1 | | 7. | 29.61s | 7. | 1:01.81 | 7. | 1:35.38 | Heat 2. | | 12.Paige Schultz | --- | 2:09.25 | 8.44s | 3 | | 5. | 29.94s | 5. | 1:02.32 | 5. | 1:35.42 | Heat 1. | | 13.Daniela Reyes | --- | 2:13.73 | 12.92s | 7 | 0.81s | 7. | 30.50s | 6. | 1:04.09 | 6. | 1:38.65 | Heat 1. | | 14.Britany Van Lange | --- | 2:20.21 | 19.40s | 1 | | 6. | 30.23s | 7. | 1:04.69 | 7. | 1:41.61 | Heat 1. |
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