Maciel is a surname of several people. It is of Portuguese origin.
Notable people with this surname include:
- Maciel Lima Barbosa da Cunha, a Portuguese footballer
- Antonio Vicente Mendes Maciel, Brazilian abolitionist and insurrectionist
- Francisco Antonio Maciel, Montevidean Criollo industrialist and philanthropist.
- Francisco Maciel, Mexican tennis player
- Lucía Maciel, Argentine actress
- Marcial Maciel, Mexican founder of the Legion of Christ
- Marco Antônio de Oliveira Maciel, a Brazilian politician