| St Pancras South West | |
|---|---|
| Former borough constituency for the House of Commons | |
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| 1918–1950 | |
| Seats | one |
| Created from | St Pancras South and St Pancras West |
| Replaced by | Holborn and St Pancras South and St Pancras North |
St Pancras South West was a constituency represented in the House of Commons of the Parliament of the United Kingdom. It elected one Member of Parliament (MP) by the first past the post system of election. It was created in 1918 by the division of St Pancras South into South East and South West divisions, and abolished in 1950.