1950–1951

• The County Borough of Norwich wards of Catton, Coslany, Fye Bridge, Heigham, Hellesdon, Mousehold, Thorpe, and Westwick.^[5]

1951–1974

• The County Borough of Norwich wards of Catton, Coslany, Fye Bridge, Heigham, Hellesdon, Mousehold, Thorpe, and Westwick; and
• The part of the civil parish of Thorpe-next-Norwich in the Rural District of Blofield and Flegg, and the part of the parish of Sprowston in the Rural District of St Faiths and Aylsham, added to the County Borough of Norwich by the Norwich Extension Act 1950.^[6]

Minor expansion of boundaries under the provisions of Statutory Instrument 1951/325.^[7]

1974–1983

• The County Borough of Norwich wards of Catton, Coslany, Crome, Heigham, Hellesdon, Mancroft, Mousehold, and Thorpe.^[8]

Further to the Second Periodic Review of Westminster Constituencies a redistribution of seats was enacted in 1970. However, in the case of the two Norwich constituencies, this was superseded before the February 1974 general election by the Parliamentary Constituencies (Norwich) Order 1973 which followed on from a revision of the County Borough of Norwich wards in 1971, resulting in a realignment of the boundary with Norwich South.

1983–1997

• The District of Broadland wards of Catton, Hellesdon North, Hellesdon South East, Hellesdon West, Sprowston Central, Sprowston East, Sprowston South, Sprowston West, Thorpe St Andrew North East, Thorpe St Andrew North West, and Thorpe St Andrew South; and

• The City of Norwich wards of Catton Grove, Coslany, Crome, Mile Cross, and Mousehold.^[9]

Gained suburban areas now part of the District of Broadland, including Thorpe St Andrew from Yarmouth and Hellesdon and Sprowston from North Norfolk.  Southern areas transferred to Norwich South.

1997–2010

• The District of Broadland wards of Catton, Drayton, Hellesdon North, Hellesdon South East, Hellesdon West, Sprowston Central, Sprowston East, Sprowston South, Sprowston West, Taverham, Thorpe St Andrew North East, Thorpe St Andrew North West, and Thorpe St Andrew South; and
• The City of Norwich wards of Catton Grove, Coslany, Crome, Mile Cross, and Mousehold.^[10]

District of Broadland wards of Drayton and Taverham transferred from Mid Norfolk.

2010–present

• The District of Broadland wards of Hellesdon North West, Hellesdon South East, Old Catton and Sprowston West, Sprowston Central, Sprowston East, Thorpe St Andrew North West, and Thorpe St Andrew South East; and

• The City of Norwich wards of Catton Grove, Crome, Mile Cross, and Sewell.^[11]

Drayton and Taverham were transferred back out, to the new constituency of Broadland. In Norwich, the part of the Crome ward around Morse Road moved to Norwich North, while the area around Mousehold Street in Thorpe Hamlet became part of Norwich South.

Following their review of parliamentary constituencies in Norfolk that concluded in 2007 and came into effect for the 2010 general election, the Boundary Commission for England created a slightly modified Norwich North constituency. The changes were necessary to re-align the constituency boundaries with the new local government ward boundaries introduced in Broadland and Norwich and to take account of Norfolk being awarded an additional, ninth constituency by the Boundary Commission.

Proposed

Further to the 2023 Periodic Review of Westminster constituencies, enacted by the Parliamentary Constituencies Order 2023, from the next general election, due by January 2025, the constituency will be expanded slightly to regain Drayton (but not Taverham) from Broadland and the area around Mousehold Street from Norwich South.^[12]

Elections in the 2020s

Nick Rose was selected as the Conservative candidate, but later resigned due to "controversial language" used.^[18]

Elections in the 2010s

Elections in the 2000s

Elections in the 1990s

Elections in the 1980s

Note: This constituency underwent boundary changes after the 1979 election, so was notionally a Conservative-held seat.^[35]

Elections in the 1970s

Elections in the 1960s

Elections in the 1950s