| Dunnville Secondary School | |
| Address: | 110 Helena Street |
| City: | Dunnville |
| Province: | Ontario |
| Postalcode: | N1A 2S5 |
| Country: | Canada |
| Coordinates: | 42.9057°N -79.628°W |
| Schooltype: | High school |
| Fundingtype: | Public |
| Schoolboard: | Grand Erie District School Board |
| Number: | 906069[1] |
| Grades Label: | Grades |
| Grades: | 9 to 12 |
| Enrollment: | 562 |
| Enrollment As Of: | January 2016 |
| Language: | English |
| Principal: | Jayne Chalmers |
| Team Name: | Panthers |
Dunnville Secondary School is a public high school in Dunnville, Ontario, Canada, part of the Grand Erie District School Board. The school accommodates students from Haldimand County between the ages of 14 and 21., the school had 562 students.