| Church of Santo Tomás | |
| Native Name: | Iglesia Colegiata de Santo Tomás |
| Native Language: | Spanish |
| Coordinates: | 42.5782°N -2.8457°W |
| Location: | Haro, Spain |
| Designation1: | Spain |
| Designation1 Offname: | Iglesia Colegiata de Santo Tomás |
| Designation1 Type: | Non-movable |
| Designation1 Criteria: | Monument |
| Designation1 Date: | 1931 |
| Designation1 Number: | RI-51-0000705 |
The Church of Santo Tomás (Spanish: Iglesia Colegiata de Santo Tomás) is a church located in Haro, Spain. It was declared Bien de Interés Cultural in 1931.
The façade, designed by Felipe Bigarny, was finished in 1525.
The baroque bell tower was built under architect Agustín Ruiz de Azcárraga who was commissioned to work on the tower in 1719, and has inspired other buildings such as the Co-cathedral of Santa María de la Redonda or Our Lady of the Assumption Church in Briones.