In 1998, the Townships of Ennismore and Smith were amalgamated to form the new Township of Smith-Ennismore, merging the Ennismore Township Fire Department and Smith Township Fire Department. In 2001, the Village of Lakefield was added to the municipality, and with it, the Lakefield Fire Department. The municipality was renamed again as Smith-Ennismore-Lakefield Township. In 2013, the name was changed to Selwyn.