Enter a full postcode
Type a valid UK postcode such as SW1A 1AA.
Postcodes & Places
Parliamentary Constituency Lookup by Postcode
Enter a full UK postcode to find the parliamentary constituency associated with that postcode.
Source: Postcodes.io (opens in a new tab)Loading calculator…
HOW IT WORKS
How the Parliamentary Constituency Lookup by Postcode works
Match constituency geography
The service resolves the postcode against current open postcode geography fields.
View the constituency
See the constituency name plus available code and local authority information.
COMMON QUESTIONS
Frequently asked questions
Can I find my parliamentary constituency from a postcode?
Yes. The open postcode dataset provides parliamentary constituency geography for full postcodes.
Does this tell me who my MP is?
No. This tool returns the constituency. MP information would require a separate parliamentary data integration.
Can I search a partial postcode?
No. This lookup expects a full UK postcode.
Where does the constituency information come from?
The live lookup uses Postcodes.io and its open postcode geography data.
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Source information
Calculation rules or data are based on Postcodes.io (opens in a new tab) where applicable. Always check the linked official guidance for unusual or high-stakes circumstances.