| Party: | Social Democratic Party |
| Term Start: | 16 July 2024 |
| Birth Date: | 21 July 1965 |
| Birth Place: | Mafra, Portugal |
| Alma Mater: | Instituto Superior Técnico |
| Occupation: | Electrical engineer • Politician |
| Office1: | Mayor of Mafra |
| Termstart1: | 14 October 2013 |
| Birth Name: | Hélder António Guerra de Sousa Silva |
| Termend1: | 29 April 2024 |
| Predecessor1: | José dos Santos |
| Successor1: | Hugo Luís |
| Termstart2: | 20 June 2011 |
| Termend2: | 13 October 2013 |
| Constituency2: | Lisbon |
| Office: | Member of the European Parliament for Portugal |
Hélder António Guerra de Sousa Silva (born 21 July 1965) is a Portuguese engineer and politician, from the Social Democratic Party. Between 2013 and 2024, he served as Mayor of Mafra.[1] He was also a member of the Assembly of the Republic, between 2011 and 2013, elected by the Lisbon constituency.[2] [3]