EC1A 1 postcode sector in the EC1A district

EC1A 1 is a sector of the EC1A district: every postcode that starts EC1A 1. It has 55 postcodes in use, 55 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 EC1A 1 sector, by flood risk

Map of every postcode in the EC1A 1 sector, by flood risk Of the 55 postcodes in the EC1A 1 sector that ONS places, 55 are not on the Environment Agency's at-risk list. One postcode lies beyond the edge and is listed under the map. Places named: Clerkenwell. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. A401A5200A201A5201 EC1A 1AA: not on the flood risk listEC1A 1AH: not on the flood risk listEC1A 1AZ: not on the flood risk list Clerkenwell Map of every postcode in the EC1A 1 sector, by flood risk Of the 55 postcodes in the EC1A 1 sector that ONS places, 55 are not on the Environment Agency's at-risk list. One postcode lies beyond the edge and is listed under the map. Places named: Clerkenwell. Drawn over roads, rivers and built-up areas. North is up; the scale bar is 250 m. A401 Clerkenwell
  • 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: 55

Of the 55 postcodes in the EC1A 1 sector that ONS places, 55 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. Names in italics are council wards: we hold no town or village names here.

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

Further out, not drawn

This postcode lies well apart from the rest, so the map is drawn without it to show the rest closer; it is in every count.

EC1A 1HQ

Postcodes in EC1A 1

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.

EC1A 1AAEC1A 1AHEC1A 1AZEC1A 1BBEC1A 1DNEC1A 1DUEC1A 1HQEC1A 1SSEC1A 1TAEC1A 1TBEC1A 1TFEC1A 1TGEC1A 1TREC1A 1TUEC1A 1TWEC1A 1UDEC1A 1UEEC1A 1UFEC1A 1UHEC1A 1UWEC1A 1UZEC1A 1WXEC1A 1WZEC1A 1XEEC1A 1XFEC1A 1XGEC1A 1XHEC1A 1XNEC1A 1XQEC1A 1XREC1A 1XSEC1A 1XTEC1A 1XUEC1A 1XWEC1A 1XYEC1A 1XZEC1A 1YAEC1A 1YDEC1A 1YFEC1A 1YJEC1A 1YLEC1A 1YPEC1A 1YQEC1A 1YREC1A 1YSEC1A 1YTEC1A 1YUEC1A 1YWEC1A 1YXEC1A 1YZEC1A 1ZBEC1A 1ZDEC1A 1ZFEC1A 1ZGEC1A 1ZH

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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