What area is the YO postcode in?

YO is a postcode district in York, York, Yorkshire, England. It is part of the YO postcode area.

How many addresses are in the YO postcode?

The YO postcode district covers York in York. The exact address count can be retrieved via the APITier Postcode Lookup API.

How do I look up addresses in YO programmatically?

Use the APITier Postcode Lookup API: GET https://postcode.apitier.com/v1/postcodes/{postcode}?x-api-key=YOUR_KEY — where the postcode begins with YO. The response returns all PAF addresses as structured JSON including building name, number, street, town, county, and geocoordinates.

Royal Mail PAF · Yorkshire

YO Postcode — York

YO is a postcode district in York, York, Yorkshire, England. Use the lookup below to explore addresses within this postcode district.

Postcode District

YO — York

Area

Yorkshire

Region

Royal Mail PAF

Data Source

Postcode Lookup — YO DistrictSample

{
  "_note": "Sample response — enter any postcode above and click Lookup for live data",
  "status": 200,
  "result": {
    "postcode": "YO 1AA",
    "quality": 1,
    "eastings": 463938,
    "northings": 497141,
    "country": "England",
    "nhs_ha": "Yorkshire",
    "longitude": -1.0866,
    "latitude": 53.9292,
    "european_electoral_region": "Yorkshire",
    "primary_care_trust": "York",
    "region": "Yorkshire",
    "lsoa": "York 001A",
    "msoa": "York 001",
    "incode": "1AA",
    "outcode": "YO",
    "parliamentary_constituency": "York",
    "admin_district": "York",
    "parish": "York, unparished area",
    "admin_county": "Yorkshire",
    "admin_ward": "York Central",
    "ced": null,
    "ccg": "NHS Yorkshire",
    "nuts": "York",
    "codes": {
      "admin_district": "E07000000",
      "admin_county": "E10000000",
      "admin_ward": "E05000000",
      "parish": "E43000000",
      "parliamentary_constituency": "E14000000",
      "ccg": "E38000000",
      "lsoa": "E01000000",
      "msoa": "E02000000"
    }
  }
}

About the YO Postcode District

The YO postcode district is part of the York (YO) postcode area, covering York and surrounding areas in Yorkshire, England.

Postcodes in the YO district follow the format YO nXX where n is a digit and XX are letters. Each inward code identifies a specific delivery walk within the district.

The wider York postcode area (YO) also covers: Scarborough, Malton, Whitby, Filey, Selby, Pickering.

Frequently Asked Questions

What area does the YO postcode cover?

The YO postcode district covers York in York, Yorkshire, England. It is one of 29 districts in the YO postcode area.

How do I look up all addresses in the YO postcode?

Use the live lookup widget above or call the APITier Postcode Lookup API: GET https://postcode.apitier.com/v1/postcodes/{full postcode}?x-api-key=YOUR_KEY. Replace {full postcode} with any complete postcode beginning YO. The API returns all Royal Mail PAF addresses as structured JSON.

Is YO a valid UK postcode district?

Yes. YO is a Royal Mail postcode district in York, England. Full UK postcodes in this district follow the format YO followed by a digit and two letters (e.g. YO 1AA).

YO Postcode — York

About the YO Postcode District

Frequently Asked Questions

Other York Postcode Districts