 This riding was created in 1975 from parts of Hastings and Peterborough East ridings.It was an approximate duplication of the federal electoral district of Hastings—Peterborough.It was initially defined, federally, as consisting of the part of the county of Peterborough lying east of and including the townships of Anstruther, Burleigh, Dummer and Asphodel; and the part of the county of Hastings lying north of and including the townships of Rawdon, Huntingdon, Madoc and Elzevir.In 1971, it was redefined (federal) to consist of the part of the county of Peterborough lying east of and including the townships of Anstruther, Burleigh, Dummer and Asphodel; and hat part of the county, together with that part of the county of Hastings lying north of a line described as commencing at the southwest corner of the township of Rawdon and following the south boundary of the said township, the south and east boundaries of the township of Huntingdon and the south boundary of the townships of Madoc and Elzevir to the east boundary of the said county.