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 |
| Thurrock | BARNES, Jamie | 77,559 | 63.9% | 244 | 0.5% | - | 5th |
| Woking | WADE, Declan | 74,269 | 70.0% | 229 | 0.4% | - | 6th |
| Streatham | BEAST, Artificial | 79,137 | 63.1% | 192 | 0.4% | - | 6th |
| Sheffield South East | BATTERSBY, Jen | 70,422 | 59.2% | 207 | 0.5% | - | 6th |
| Leeds West | WEST, Matthew | 64,950 | 59.2% | 217 | 0.6% | - | 6th |
| Kensington | AUGUSTE, Tony | 61,133 | 57.0% | 211 | 0.6% | - | 6th |
| Islington South and Finsbury | KIRTON, Jay | 68,127 | 65.0% | 309 | 0.7% | - | 6th |
| Holborn and St Pancras | O'DONNELL, Shane | 86,764 | 63.3% | 252 | 0.5% | - | 6th |
| Great Yarmouth | TOWNLEY, Sam | 69,793 | 63.7% | 167 | 0.4% | - | 6th |
| Esher and Walton | HEENAN, Matt | 79,894 | 71.3% | 396 | 0.7% | - | 6th |
| Eddisbury | ANTAR, George | 68,569 | 69.1% | 301 | 0.6% | - | 6th |
| Cities of London and Westminster | DESFORGES, Edouard-Henri | 60,992 | 59.3% | 160 | 0.4% | - | 6th |
| Hackney South and Shoreditch | BIRCH, Paul | 84,971 | 56.0% | 297 | 0.6% | - | 7th |
| Stoke-on-Trent Central | MAJID, Ali | 60,634 | 51.3% | 244 | 0.8% | - | 7th |
| Wakefield | BARR, Elliot | 70,521 | 60.9% | 283 | 0.7% | - | 7th |
| Guildford | SMYTH, Gerri | 75,733 | 71.3% | 196 | 0.4% | - | 8th |
| Vauxhall | JENSEN, Louis | 82,231 | 58.3% | 164 | 0.3% | - | 8th |
| Bethnal Green and Bow | DEWEY, Jonathan | 82,727 | 64.0% | 303 | 0.6% | - | 8th |
| Camberwell and Peckham | ROBERTSON, Alex | 82,746 | 62.3% | 197 | 0.4% | - | 9th |
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.