An election to the 56th Parliament of the United Kingdom for the constituency area of South West Norfolk, held as part of the general election on 7 May 2015.
Conservative hold by Elizabeth Truss with a majority of 13,861 - 27.7% - on a turnout of 65.1%.
Candidates
| Name | Party | Vote | Vote share | Vote change |
| TRUSS, Elizabeth | Con | 25,515 | 50.9% | 2.6% |
| SMYTH, Paul | UKIP | 11,654 | 23.3% | 17.0% |
| SMITH, Peter | Lab | 8,649 | 17.3% | -1.3% |
| MOSS-ECCARDT, Rupert | LD | 2,217 | 4.4% | -17.2% |
| WALMSLEY, Sandra | Green | 2,075 | 4.1% | 2.5% |
Under section 13(b) of the Representation of the People Act 1985, a candidate gaining 5% or less of the vote share will forfeit their deposit.
An electorate of 76,970, having a valid vote count of 50,110 and an invalid vote count of 192.
Result declared at 08:08 on 8 May 2015.