YO21 postcode district

Postcodes and sectors

681 of the district's 809 postcodes are live in the ONS Postcode Directory of August 2026. A postcode directory says whether a code is in use, never who is there. The live postcodes centre on 54.47688, -0.71097, which locates the district, not a building.

Companies registered in YO21

Companies House lists 898 companies with a registered office in YO21; 267 of them at addresses shared by 25 or more companies (1 October 2026 snapshot). 25 is the count at which the address lookup reports a company cluster.

Places OS Open Names lists for YO21

• North Yorkshire
• Yorkshire and the Humber
• Whitby
• Castleton
• Glaisdale
• Ainthorpe
• Danby
• Sandsend
• Aislaby
• Ruswarp
• Egton
• Briggswath
• Lythe
• Newholm
• Egton Bridge
• Commondale
• Westerdale
• Carr End
• Kildale
• Lealholm
• Ugthorpe
• East Barnby
• Lealholmside
• Dunsley

Roads filed under YO21

Named roads first, then numbered ones. A road is filed under one district even where it runs through several, so a street missing here may be listed under a neighbouring district — which is why the address lookup never calls a British street absent. Great Britain has no open register of buildings, so a listed road never means a building on it exists.

• Abbeville Avenue
• Ainthorpe Lane
• Aislaby Lane
• Albert Place
• Albion Place
• Ammonite Grove
• Anchorage Way
• Angel Yard
• Argyle Road
• Arundel Howe
• Arundel Place
• Ashfield Road
• Ash Grove
• Ash Lea
• Auckland Court
• Auckland Way
• Back Lane
• Back St Hilda's Terrace
• Bagdale
• Bakehouse Yard
• Bank Lane
• Barker's Lane
• Barnard's Road
• Barry Bank
• Battery Parade
• Baxtergate
• Beech Grove
• Beeching Mews
• Belle Vue Terrace
• Bellhouse Lane
• Bennison Lane
• Birk Field Bank
• Blenheim Avenue
• Bogs Lane
• Bow Bridge Lane
• Bridge Green
• Brier Hill
• Briggswath
• Broad Gate Road
• Brook Lane
• Brook Park
• Broom House Lane
• Brownswood Cottages
• Brunswick Street
• Burtree Lane
• Byland Court
• Byland Road
• Caedmon Avenue
• Canterbury Close
• Caper Hill
• Carr Hall Gardens
• Carr Hill Lane
• Carr Hill Ridge
• Carr Lane
• Castle Lane
• Castle Road
• Caygill Street
• Chancel Way
• Charlton Avenue
• Cherry Close

Check an address in YO21

Check an address in YO21

The same road list through the API, from the outward code alone:

curl "https://spaw.co/api/v1/address/streets?country=GB&postal_code=YO21" \
  -H "Authorization: Bearer $SPAW_KEY"

Common questions about YO21

What does a YO21 postcode tell you?

That the address lies in the YO21 district of the YO (York) postcode area, and the place OS Open Names most often lists first for its postcodes is Whitby. The district alone does not place a street: the inward half of the full postcode narrows the address to one of the district's 681 live postcodes.

Where the counts come from

• ons-postcode-directory · version 2026-08 · Contains ONS, OS and Royal Mail data © Crown copyright and database right 2026, Open Government Licence v3.0. Northern Ireland postcodes are excluded: their reuse needs a Land & Property Services licence.
• os-open-names · version 2026-11-01 · Contains OS data © Crown copyright and database right 2026, Open Government Licence v3.0.
• uk-companies-house · version 2026-10-01 · Companies House free company data product, Open Government Licence v3.0

What each figure means, and what a district page never says, is set out in Reading a British postcode district page; the glossary defines a postcode district, a postcode area, a postcode directory and a street register.

Data synced on 2026-11-01: the newest version among the datasets listed above.

Districts nearest YO21

• YO226.5 km
• TS1312.3 km
• TS1219.1 km
• TS1423.5 km
• TS1123.8 km
• YO1824.6 km
• YO1325.3 km
• TS1027.3 km
• YO1229.3 km
• TS929.4 km
• TS630.2 km
• TS731.1 km
• Every district
• How a British address is written
• Check any address

distance between the districts' centroids