St. Pancras North was a borough constituency represented in the House of Commons of the Parliament of the United Kingdom.

It was created in 1885 and abolished in 1983 with the area becoming part of the new constituency of Holborn and St Pancras.

1918–1950: The Metropolitan Borough of St Pancras wards of one and two, and the part of ward number three lying to the north and west of a line running along the middle of Camden Road from a point where that road is intersected by the eastern boundary of the metropolitan borough to the point where that road crosses the Regent's Canal and thence westward along the middle of that canal to the western boundary of Ward number three.

1950–1974: The Metropolitan Borough of St Pancras wards of one, two, three and four.

1974–1983: The London Borough of Camden wards of Camden, Chalk Farm, Gospel Oak, Grafton, Highgate, and St John's.