Loyalist is a lower-tier township municipality in central eastern Ontario, Canada on Lake Ontario. It is in Lennox and Addington County and consists of two parts: the mainland and Amherst Island. It was named for the United Empire Loyalists, who settled in the area after the American Revolution. Loyalist Township was formed on January 1, 1998, through the amalgamation of Amherst Island Township, Ernestown Township, and Bath Village.