The York Region District School Board (YRDSB), until 1999, English-language Public District School Board No. 16 is the English-language public school board for the Regional Municipality of York in Ontario, Canada. The York Region District School Board is the province's third-largest school board after Toronto's TDSB and Peel's PDSB, with an enrolment of over 122,000 students. It is in the fastest-growing census division in Ontario and the third-fastest growing in Canada.

The Regional Municipality of York, also called York Region, is a regional municipality in Southern Ontario, Canada, between Lake Simcoe and Toronto. The region was established after the passing of then Bill 102, An Act to Establish The Regional Municipality of York, in 1970. It replaced the former York County in 1971, and is part of the Greater Toronto Area and the inner ring of the Golden Horseshoe. The regional government is headquartered in Newmarket.