Hywel Williams Elections contested
Parliament Member page for Hywel Williams
Elections listed as contested and won are those forming part of any general election or by-election contested since since the 2010 general election. A person may have contested an election outside of this grouping.
| Election | Constituency | Election type | Party | Vote count | Vote share | Position |
| 12 December 2019 | Arfon | General election | PC | 13,134 | 45.2% | 1st |
| 8 June 2017 | Arfon | General election | PC | 11,519 | 40.8% | 1st |
| 7 May 2015 | Arfon | General election | PC | 11,790 | 43.9% | 1st |
| 6 May 2010 | Arfon | General election | PC | 9,383 | 36.0% | 1st |