Postcode to Scottish Parliament / Senedd Cymru Constituency Tool (2026)

This tool converts a column of Scottish and Welsh postcodes into Scottish Parliament and Senedd Cymru (Welsh Parliament) constituency information, using the boundaries for the 2026 elections.

Paste a column from Excel or Google Sheets into the left-hand box, and constituency information will appear in the right-hand box.

Copy these back to your spreadsheet, and you're done. For more complex approaches, use MapIt, or download the source data.

This all happens on your own computer, the postcodes are not sent to our server.

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Output Type

Constituency name

mySociety ID

GSS code

Three code

Region name

Region code

Region GSS code

Country

More information

This tool was made by mySociety - subscribe to our mailing list for information about our other tools and services.
This tool covers Scottish Parliament and Senedd Cymru (Welsh Parliament) constituencies for 2026.
Only postcodes in Scotland and Wales are included in this lookup.
Postcode lookups are not accurate for all addresses — on (rare) occasions different addresses in the same postcode are in different constituencies.
This lookup may be inaccurate for postcodes created in the last year.