| Cassiobury | |
|---|---|
 Cassiobury Drive | |
  Cassiobury Location within Hertfordshire | |
| Population | 14,031 |
| OS grid reference | TQ106969 |
| District | |
| Shire county | |
| Region | |
| Country | England |
| Sovereign state | United Kingdom |
| Post town | WATFORD |
| Postcode district | WD17 WD18 |
| Dialling code | 01923 |
| Police | Hertfordshire |
| Fire | Hertfordshire |
| Ambulance | East of England |
| UK Parliament | |
The Cassiobury Estate is a suburban residential area of Watford in Hertfordshire, England. It is bounded to the south by Cassiobury Park, the main public park in the town, to the west by playing fields next to the River Gade, and to the northeast by Hempstead Road. It is mostly characterised by 1930s Mock Tudor houses.
To the northwest of Cassiobury, outside the Borough of Watford in the Three Rivers District, is The Grove, the former estate and house of the Earls of Clarendon. This has been converted into a luxury hotel and with extensive grounds.