All over the world, Sedley (Sedley 
) is a very rare mostly boy's, but uncommonly female first name. The forename Sedley is habitual in South Africa, where it is a very rare male name, the United Kingdom, and the United States, where it is a very rare dominantly boy's, but infrequently feminine name. Also, Sedley is the last name as well as the forename.
| VARIANT | COUNTRY |
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| Sedley | Jamaica, Canada, Australia, United States, United Kingdom |
Sedley is also a name for the fictitious and mythical characters: .
| sir john sedley, 2nd bt. Peerage person ID=525365 |
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| sir william sedley, 4th bt. (died 1656) |
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| sir henry sedley, 3rd bt. (died 1641) |
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| sir william sedley, 1st bt. (died 1618) |
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| sir charles sedley Peerage person ID=700299 |
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