SL Postcode Area for the Slough Region

A wide range of spatial data has been analysed to present this overview. If you would like anything added, please contact us.

This section of the site is all about the SL Postcode area, also known as the Slough Postal Area. Explore links to the next level to learn more about specific postcode districts such as SL0.

Detailed map of the SL Postcode Area
Detailed map showing districts and posttowns in the SL Slough Area
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Map of the SL Slough Postcode Area

Explore the postcode area by using our interactive map.


Quick Facts about the SL Postcode

SL Area Statistics
Width from East to West 16.31 mi
Height from North to South 17.85 mi
Area of SL 154.70 mi²
Maximum Width 19.07 mi
Perimeter of Postcode Area 82.56 mi
Number of Postcode Districts 12
Number of Postcode Sectors 58
Number of Post Towns 8
Number of Postcodes 10,613
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The SL postcode area represents a group of 10 postal districts in the Slough area of the United Kingdom. The area code stands for the letters s and l in SLough. The area has a population of 373,607 and covers an area of 400,686 hectares. Fun fact: 0.57% of the population of Great Britain lives in this area.

The postcode area falls within the following counties: Berkshire (70.94%), Buckinghamshire (28.94%), Surrey (0.10%), Hertfordshire (0.02%).

Where is the SL Postcode Area?

The Slough SL Postcode is in the South East of England.. The postal area borders the following neighbouring postal areas: GU - Guildford, WD - Watford, RG - Reading, UB - Uxbridge, TW - Twickenham and HP - Hemel Hempstead, and is located inland.


Map Showing Location of the postcode area
Where is the postcode area?
A word cloud for the postcode area
A word cloud for the area

How built up is the Postcode Area?

I've calculated the total area covered by building footprints within the postcode area.
By analyzing this against the total area, I've determined the percentage of the area that's developed, this will give you an idea of how urban or rural the postcode region is.
The higher the percentage the more urban the area is. For example the least urban district is SL7 and the most urban is SL1.

Building Area Summary
Postcode District Total Area (m²) Footprint Area (m²) Built Percentage %
SL7 46,258,590 1,261,671 2.73%
SL4 65,248,430 2,233,627 3.42%
SL5 40,575,842 1,589,491 3.92%
SL0 21,201,647 841,810 3.97%
SL6 97,665,260 4,177,540 4.28%
SL9 27,141,803 1,395,613 5.14%
SL3 37,867,495 2,197,390 5.80%
SL2 29,193,662 2,018,898 6.92%
SL8 5,469,457 384,202 7.02%
SL1 30,061,926 3,059,120 10.18%
Total 400,684,112 (m²) 19,159,362 (m²) 4.78%
Map of the SL Postcode Area

A map showing the boundary of SL in relation to other areas

There are 6 towns within the Slough postcode area.

Map of Posttowns in the SL
Map of Posttowns in the SL Postal Area
Area of the SL postcode area
Unit Area²
Hectares 400,686²
Miles 1,547²
Feet 43,129,440,354²
Kilometres 4,007²

Postal Delivery Offices Serving the Postcode Area

  • Ascot Delivery Office
  • Bourne End Scale Payment Delivery Office
  • Gerrards Cross Delivery Office
  • Iver Delivery Office
  • Maidenhead Delivery Office
  • Marlow Delivery Office
  • Slough Delivery Office
  • Windsor Delivery Office

Tourist Attractions within the Area

Nearby Postcodes

Towns and Villages within the Area