Explore HA4 0QL in Harrow on an interactive map. See its location and approximate address-derived boundary, then review the exact-postcode facts and wider-area statistics available below. Editable vector files, printed maps and postcode colouring tools are also available. Census 2021 records 21 residents and 11 households at the exact postcode.
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Create a Custom MapCore details from the ONS Postcode Directory. Geography codes identify the official areas containing this postcode.
| Postcode | HA4 0QL |
| Postcode without spaces | HA40QL |
| Status | Active postcode |
| User type | Small user postcode |
| Introduced | January 1980 |
| Directory version | 2026-06 |
| Latitude | 51.5587100 |
| Longitude | -0.3796860 |
| British National Grid | 512,421 E, 185,669 N |
| Country | England |
| Region | London |
| Local authority | Harrow |
| Output Area (2021) | E00011094 |
| LSOA (2021) | E01002223 |
| MSOA (2021) | E02000463 |
| Electoral ward | E05013559 |
| Westminster constituency | E14001271 |
The postcode is assigned to these official political geographies. Names and election results will be added when the ElectionMaps datasets are connected.
These Census figures are matched directly to the full postcode, rather than inferred from a wider neighbourhood.
| Residents | 21 |
| Households | 11 |
| Female residents | 12 |
| Male residents | 9 |
| Residents per household | 1.9 |
A detailed vector map covering a 500 metre radius around the postcode.
Deprivation is published for the postcode's containing Lower Layer Super Output Area, a neighbourhood geography covering more than one postcode.
Open schools and active GP practices in the HA4 postcode district, ordered by straight-line distance where coordinates are available.
B
700 FIELD END ROAD, RUISLIP, HA4 0QR
Academy converter
Queens Walk, Ruislip, Middlesex, HA4 0LS
Ages 11–18 · 1,502 pupils of 1,476 capacity
22.7% eligible for free school meals
Community school
Queens Walk, Ruislip, Middlesex, HA4 0LR
Ages 3–11 · 684 pupils of 568 capacity
15.5% eligible for free school meals
B
69 QUEENS WALK, RUISLIP, HA4 0NT
Voluntary aided school
Hunters Hill, South Ruislip, Ruislip, Middlesex, HA4 9HS
Ages 3–11 · 231 pupils of 240 capacity
6.3% eligible for free school meals
Community school
Field End Road, Eastcote, Ruislip, Middlesex, HA4 9PQ
Ages 2–7 · 265 pupils of 345 capacity
14.3% eligible for free school meals
Academy converter
Field End Junior School, Field End Road, Ruislip, HA4 9PQ
Ages 7–11 · 254 pupils of 360 capacity
26.4% eligible for free school meals
Community school
Cedar Avenue, Ruislip, HA4 6UJ
Ages 3–11 · 203 pupils of 250 capacity
19.1% eligible for free school meals
B
1 OXFORD DRIVE, RUISLIP, HA4 9EY
B
21 WALNUT WAY, SOUTH RUISLIP, RUISLIP, HA4 6TA
Community school
Newnham Infant and Nursery School, Newnham Avenue, Eastcote, Ruislip, HA4 9RW
Ages 3–7 · 302 pupils of 270 capacity
7.8% eligible for free school meals
Community school
Newnham Avenue, Ruislip, HA4 9RW
Ages 7–11 · 350 pupils of 360 capacity
9.1% eligible for free school meals
Companies House records whose registered-office address uses this exact postcode.
Private Limited Company
Incorporated 4 September 2025
56101 - Licensed restaurants
Private Limited Company
Incorporated 13 June 2025
46520 - Wholesale of electronic and telecommunications equipment and parts
Private Limited Company
Incorporated 14 August 2024
47710 - Retail sale of clothing in specialised stores
Private Limited Company
Incorporated 31 August 2022
78109 - Other activities of employment placement agencies
Private Limited Company
Incorporated 29 August 2022
47910 - Retail sale via mail order houses or via Internet
Private Limited Company
Incorporated 12 March 2019
56210 - Event catering activities
Private Limited Company
Incorporated 11 July 2014
56102 - Unlicensed restaurants and cafes
Private Limited Company
Incorporated 25 October 2013
47110 - Retail sale in non-specialised stores with food, beverages or tobacco predominating
Police.uk street-level incidents recorded across the postcode's containing LSOA in May 2026.
Harrow 031D includes HA4 0QL and other nearby postcodes.
| Crime type | Incidents |
|---|---|
| Violence and sexual offences | 3 |
| Burglary | 1 |
| Vehicle crime | 1 |
Answers use the geographic scope stated with each dataset above.
HA4 0QL is in Harrow, England.
The Census 2021 postcode-level dataset records 21 residents at HA4 0QL. This is an exact postcode count.
The deprivation figures describe the containing Lower Layer Super Output Area, not only the individual postcode.
Vector Maps supplies editable UK postcode area, district and sector map files. For a vector or printed map focused on the full HA4 0QL postcode and its approximate address-derived outline, request a custom map.
Explore other full postcodes in the same postcode sector.