Deepdene is a rural locality in the South West region of Western Australia, within the Shire of Augusta-Margaret River.
| Deepdene Western Australia | |
|---|---|
 The building at Jewel Cave in Deepdene | |
  Deepdene | |
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| Coordinates | 34°15′37″S 115°4′17″E / 34.26028°S 115.07139°E |
| Population | 56 (as of 2021) |
Deepdene is situated near Hamelin Bay and Karridale. It lies along Caves Road, and is close to coastal features such as Cosy Corner. The postcode for Deepdene is 6290. It is also near Augusta or Jewel Cave.
A notable heritage property is the house known as Deepdene, constructed in 1881 by John Allnutt. The original dwelling (named "Ducalup") on that property burned down in 1870. The Deepdene estate was once part of large pastoral leases held by the Allnutt family; in the 1880s they held some 27,000 acres, 11,000 of which made up the Deepdene estate.
Tourist spots include:
Deepdene has very low population: 54 residents, and area of roughly 38.908 square kilometres. Time zone there is Australian Western Standard Time (AWST).