Boundary-Line

From parliamentary constituencies to council wards, Boundary-Line maps every administrative boundary in detail for you. And what's more, it's completely free to download and use.

  • Addressing and location
  • Download
  • OS OpenData Plan (FREE)
  • Public Sector Plan
  • Premium Plan

This product is updated twice a year

Representation of data provided
Representation of data provided
© Crown copyright and database rights. Ordnance Survey 2025

What Boundary-Line provides you with

Highlight the social and economic trends

Public bodies release a wealth of data via data.gov.uk, census results and other sources. By illustrating your analysis on maps created with Boundary-Line, you'll be able to highlight the social and economic trends shaping changes in how we live and work.

View historical county boundaries

As an addition to the core Boundary-Line product, which is updated twice a year, you can download data showing historical county boundaries from the late 19th Century. This is ideal for historians who need to analyse old census records and archives.

A robust framework

Monitoring outcomes by area is key for public bodies. Boundary-Line gives you a robust analytical framework to ensure the right communities get the right resources.

Professional quality, free of charge

Mapped at a scale of 1:10 000, Boundary-Line is quality-assured to the same standard as our premium products. But since it's covered by the Open Government Licence (OGL), you can download it for free and use it in a wide range of ways.

Boundary-Line

Technical information

© Crown copyright and database rights. Ordnance Survey 2025

Specifications

Use cases

Bring statistics to life, for academics or policy-makers

Boundary-Line brings the statistics in your reports to life. It lets you show differences between regions or councils using easy-to-read shaded maps.

Individual properties

When you're consulting on updating boundaries to take account of population change, Boundary-Line lets you show on a map where the line's being drawn, right down to the level of individual properties.

Access
  • Download
Data theme
  • Administrative and Statistical Units
Data structure
Vector - Polygons
Coverage
Great Britain
Scale
1:10 000
Format
  • Vector Tiles
  • GeoPackage
  • ESRI Shapefile
  • MapInfo TAB
  • GML 3.2.1
Ordering area
  • All of Great Britain
Publication months
  • May
  • October
OS Data Hub plan
  • OS OpenData Plan (FREE)
  • Public Sector Plan
  • Premium Plan

Documents and Support

Technical documentation

  • Boundary-Line technical documentation
    Visit docs.os.uk to access all technical documentation for this product, including getting started guide, technical specification, release notes and other additional product details.
    link

Boundary-Line

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What you get

Key features
  • Highlight the social and economic trends
  • View historical county boundaries
  • A robust framework
  • Professional quality, free of charge
Category
Addressing and location
Access
  • Download
Data structure
Vector - Polygons
Update frequency
Twice a year

How to access

OS OpenData is free

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Further support

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