Results for the UK general election on 7 May 2015 England - Elections contested by Cannabis Is Safer Than Alcohol
| Constituency | Candidate | Electorate | Turnout | Votes | Vote share | Vote change | Position |
| Esher and Walton | HEENAN, Matt | 79,894 | 71.3% | 396 | 0.7% | - | 6th |
| Islington South and Finsbury | KIRTON, Jay | 68,127 | 65.0% | 309 | 0.7% | - | 6th |
| Bethnal Green and Bow | DEWEY, Jonathan | 82,727 | 64.0% | 303 | 0.6% | - | 8th |
| Eddisbury | ANTAR, George | 68,569 | 69.1% | 301 | 0.6% | - | 6th |
| Hackney South and Shoreditch | BIRCH, Paul | 84,971 | 56.0% | 297 | 0.6% | - | 7th |
| Wakefield | BARR, Elliot | 70,521 | 60.9% | 283 | 0.7% | - | 7th |
| Holborn and St Pancras | O'DONNELL, Shane | 86,764 | 63.3% | 252 | 0.5% | - | 6th |
| Thurrock | BARNES, Jamie | 77,559 | 63.9% | 244 | 0.5% | - | 5th |
| Stoke-on-Trent Central | MAJID, Ali | 60,634 | 51.3% | 244 | 0.8% | - | 7th |
| Woking | WADE, Declan | 74,269 | 70.0% | 229 | 0.4% | - | 6th |
| Leeds West | WEST, Matthew | 64,950 | 59.2% | 217 | 0.6% | - | 6th |
| Kensington | AUGUSTE, Tony | 61,133 | 57.0% | 211 | 0.6% | - | 6th |
| Sheffield South East | BATTERSBY, Jen | 70,422 | 59.2% | 207 | 0.5% | - | 6th |
| Camberwell and Peckham | ROBERTSON, Alex | 82,746 | 62.3% | 197 | 0.4% | - | 9th |
| Guildford | SMYTH, Gerri | 75,733 | 71.3% | 196 | 0.4% | - | 8th |
| Streatham | BEAST, Artificial | 79,137 | 63.1% | 192 | 0.4% | - | 6th |
| Great Yarmouth | TOWNLEY, Sam | 69,793 | 63.7% | 167 | 0.4% | - | 6th |
| Vauxhall | JENSEN, Louis | 82,231 | 58.3% | 164 | 0.3% | - | 8th |
| Cities of London and Westminster | DESFORGES, Edouard-Henri | 60,992 | 59.3% | 160 | 0.4% | - | 6th |
Turnout as calculated by the House of Commons Library, is the total number of votes cast and not spoiled, divided by the size of the electorate.
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.