Limestone District School Board (LDSB, known as English-language Public District School Board No. 27 prior to 1999) is an English public district school board encompassing a region that includes the City of Kingston and the counties of Frontenac and Lennox and Addington in Eastern Ontario, Canada. The board was founded in a 1998 provincial reorganization of all Ontario school boards. It is an amalgamation of the former Frontenac County and Lennox and Addington County Boards of Education. The board's Chair for 2015-2016 is David Jackson. The Vice-Chair is Paula Murray.