AL1 9 postcode sector in the AL1 district

AL1 9 is a sector of the AL1 district: every postcode that starts AL1 9. It has 116 postcodes in use, 116 of them large-user postcodes. A large-user postcode is one Royal Mail gives to a single address that gets a lot of mail.

Not sure what a sector is? UK postcode format explained.

Every postcode in the AL1 9 sector, by flood risk

Map of every postcode in the AL1 9 sector, by flood risk Of the 116 postcodes in the AL1 9 sector that ONS places, 116 are not on the Environment Agency's at-risk list. Places named: St Albans. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. A1057 AL1 9AE: not on the flood risk listAL1 9SA: not on the flood risk list St Albans Map of every postcode in the AL1 9 sector, by flood risk Of the 116 postcodes in the AL1 9 sector that ONS places, 116 are not on the Environment Agency's at-risk list. Places named: St Albans. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 500 m. St Albans
  • A home or business at high risk: 0
  • At medium risk at worst: 0
  • At low risk at worst: 0
  • At very low risk only: 0
  • Not on the at-risk list: 116

Of the 116 postcodes in the AL1 9 sector that ONS places, 116 are not on the Environment Agency's at-risk list.

Each mark is a postcode's centre point as ONS gives it, not a building. Press one to see its postcode and open its page. No boundary is drawn. Where marks overlap, the one first in the key is drawn; the counts include every postcode.

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026, the centre point of each postcode; flood risk: Environment Agency, published 6 July 2026; roads, rivers and built-up areas: Contains OS data © Crown copyright and database right 2026. Drawn by us. Street map: Ordnance Survey, OS Open Zoomstack, Open Government Licence v3.0, drawn with MapLibre. How we use them

Postcodes in AL1 9

Pick a postcode to see its council and MP, broadband, flood risk, what homes sell for, council tax, the nearest schools and stations, and crime around it.

AL1 9AEAL1 9BAAL1 9BDAL1 9BLAL1 9BRAL1 9BSAL1 9BYAL1 9DAAL1 9EDAL1 9ETAL1 9EZAL1 9FAAL1 9FBAL1 9FLAL1 9FPAL1 9FZAL1 9GDAL1 9GFAL1 9GJAL1 9HJAL1 9HRAL1 9HUAL1 9HXAL1 9JBAL1 9JEAL1 9JLAL1 9JRAL1 9JTAL1 9JUAL1 9JWAL1 9JXAL1 9JZAL1 9LTAL1 9LWAL1 9LZAL1 9NBAL1 9NEAL1 9NGAL1 9NQAL1 9NSAL1 9NTAL1 9PJAL1 9PQAL1 9PUAL1 9QDAL1 9QGAL1 9QNAL1 9QSAL1 9QTAL1 9RAAL1 9RBAL1 9RGAL1 9RJAL1 9RRAL1 9SAAL1 9SBAL1 9SDAL1 9SEAL1 9SGAL1 9SSAL1 9SXAL1 9SYAL1 9SZAL1 9TAAL1 9TBAL1 9TEAL1 9TGAL1 9TJAL1 9TLAL1 9TNAL1 9TPAL1 9TQAL1 9TRAL1 9TSAL1 9TTAL1 9TUAL1 9TWAL1 9TYAL1 9TZAL1 9UFAL1 9UHAL1 9UJAL1 9ULAL1 9UPAL1 9UQAL1 9URAL1 9USAL1 9UWAL1 9WBAL1 9WQAL1 9WRAL1 9WSAL1 9WUAL1 9XPAL1 9XQAL1 9XRAL1 9XSAL1 9XTAL1 9XUAL1 9XWAL1 9XXAL1 9XYAL1 9XZAL1 9YAAL1 9YBAL1 9YDAL1 9YEAL1 9YFAL1 9YGAL1 9YHAL1 9YJAL1 9YLAL1 9YNAL1 9YPAL1 9YQAL1 9ZZ

Source: Office for National Statistics (ONS) Postcode Directory, August 2026, loaded 20 October 2026. Postcodes that have ended are not listed. See all our data sources

What council am I in? The council, borough or local authority for a postcode, and the county council where there is one. What ward am I in? The ward for a postcode, with its council, constituency and parish.

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