Teams Charlotte O'Brien played for
| Women's List A | Cambridgeshire and Huntingdonshire Women (2018) |
| Women's Under-13 County Cup | Huntingdonshire Under-13s Women (2016) |
| Women's Under-15 County Cup | Huntingdonshire Under-15s Women (2015-2018) |
| Women's Under-15 Twenty20 | Huntingdonshire Under-15s Women (2015-2018) |
| Women's Under-17 County Cup | Huntingdonshire Under-17s Women (2015-2018) |
| Cambridgeshire Under-17s Women (2019) | |
| Women's Under-17 Twenty20 | Huntingdonshire Under-17s Women (2018) |
| Women's Miscellaneous | Needingworth Women (2016) |
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