Postcode HA4
Ruislip · Greater London, England
HA4 is the postcode of Ruislip in Greater London, England, United Kingdom. This list covers outward codes — the first half of a UK postcode, such as M9 or BN91 — not full postcodes.
- Postcode
- HA4
- County
- Greater London
- Country
- England
- Country
- United Kingdom
Place with postcode HA4
| Place | County | Location |
|---|---|---|
| Ruislip | Greater London | 51.573, -0.423 |
Near London
The nearest major city is London, about 22 km away.
Nearby postcodes
Frequently asked questions
Which places use postcode HA4?
Ruislip.
Which county and country is HA4 in?
Greater London, England, United Kingdom.
What is the nearest major city to HA4?
London, about 22 km away.
Source: GeoNames postal codes (CC BY 4.0), geonames.org, retrieved 2026-10-22. Place coordinates are approximate. Check with the national postal service before sending anything valuable.