| Grand River Collegiate Institute | |
| Address: | 175 Indian Road |
| City: | Kitchener |
| Province: | Ontario |
| Postcode: | N2B 2S7 |
| Country: | Canada |
| Coordinates: | 43.4574°N -80.4372°W |
| Schooltype: | High School |
| Founded: | 1966 |
| Schoolboard: | Waterloo Region District School Board |
| Superintendent: | Bill Lemon |
| Principal: | Josh Windsor[1] |
| Principal Label2: | Vice-Principals |
| Principal2: | Christine Moser, Ben Crane, Dollie Butticci |
| Grades Label: | Grades |
| Grades: | 9-12 |
| Enrollment: | 1450 |
| Enrollment As Of: | November 2023 |
| Language: | English and French (Extended) |
| Area: | Stanley Park |
| Colours: | Gold, Blue, and White |
| Mascot: | A Warrior |
| Team Name: | Renegades |
Grand River Collegiate Institute is a public secondary school in Kitchener, Ontario. The school is located at 175 Indian Road. It is part of the Waterloo Region District School Board. As of November 2023, there are approximately 1450 full-time students and 130 staff.
As the fifth collegiate in Kitchener-Waterloo, Grand River Collegiate (GRCI) was built on Indian Road near the Grand River in Kitchener's eastern area. "Grand River" was chosen in favour of other names like 'Parkwood' or 'Sand Hills', as the name for the new school. GRCI officially opened on September 6, 1966, with about 850 students and 55 teachers.
Grand River Collegiate Institute has had seven principals:
Grand River has athletic groups which include: alpine skiing, archery, badminton, basketball, cross-country, curling, dance, field hockey, football, ice hockey, Nordic skiing, power lifting, rugby, soccer, swimming, tennis, track & field and volleyball. Grand River's sports teams are known as the Renegades (commonly shortened to the "Rens").