| Thunder Bay Catholic District School Board | |
| Region: | Thunder Bay, Ontario |
| Country: | Canada |
| Location: | 459 Victoria Ave W. Thunder Bay, Ontario P7C 0A4[1] |
| Coordinates: | 48.3845°N -89.2876°W |
| Superintendent: | Sheila Chiodo JP Tennier Omer Belisle Allison Sargent |
| Chair Of The Board: | Francis Veneruz |
| Director Of Education: | Pino Tassone |
| Free Label1: | Elected trustees |
| Free Text1: | Dina McFarlane Eleanor Ashe Francis Veneruz Kathy O'Brien Lawrence Badanai Loretta Fonso Philip Pelletier |
| Schools: | 20: 15 elementary, 3 senior elementary, 2 secondary[2] |
| District Id: | B29068 |
| Students: | 8,132[3] 2013 |
The Thunder Bay Catholic District School Board (known as English-language Separate District School Board No. 34A prior to 1999[4]) oversees all Catholic schools in the Thunder Bay CMA and the townships of Gorham and Ware in Ontario, Canada. It administers education at 15 elementary schools, 3 senior elementary, and 2 secondary schools.