| Upper Canada District School Board | |
| Native Name: | UCDSB |
| Region: | Eastern Ontario counties: Leeds and Grenville, Stormont, Dundas, Glengarry, Prescott and Russell, Lanark County. |
| Country: | Canada |
| Location: | Brockville, Ontario |
| Coordinates: | 44.5932°N -75.7026°W |
| Chair Of The Board: | Jamie Schoular |
| Director Of Education: | Ron Ferguson |
| Free Label1: | Elected Trustees |
| Free Label2: | Student Trustees |
| Free Text2: | Afaq Virk (Student Senate Chair) Merab Ali (Student Senate Vice-Chair) |
| Schools: | 78 total; 57 elementary, 21 secondary |
| Budget: | CA$424 million[1] million (Based on 2023-24 Revised Estimates) |
| District Id: | B66192 |
| Students: | 26,701 approx; 17,686 elementary, 8,235 secondary, 780 alternative/continuing education |
The Upper Canada District School Board (UCDSB), known as English-language Public District School Board No. 26 prior to 1999[2]) is one of the largest public school boards in Ontario in terms of geographical area, spanning 12,000 square kilometres. It encompasses the counties in the easternmost portion of the province, including the cities of Brockville, Clarence-Rockland, Carleton Place, Cornwall, and Akwesasne. It covers most of the area surrounding - but not including - the city of Ottawa. Trustee elections are held every four years to elect new trustees.
The board manages a main office in Brockville and four regional education centres, and offers alternate and continuing education at over 30 locations.
Secondary school enrollment (according to data from the Ontario Ministry of Education's School Information Finder service) and Fraser Institute provincial rankings[3] are as follows:
Additionally, the Board operates the Eastern Ontario Education and Training Centre in Hawkesbury, along with Conseil des écoles publiques de l'Est de l'Ontario and the Conseil scolaire district catholique de l'Est ontarien.