It is one of the 12 hundreds of the County of Dalhousie and was proclaimed by Governor James Fergusson in 1871.

The locality of Sunnybrae occupies the remainder of the hundred.

The District Council of Yongala was established in 1883 bringing local government administration to the hundred for the first time.

Shortly after, in 1886, the Corporate Town of Peterborough seceded from Yongala to directly represent the interests of the township of Peterborough in the hundred's north east.

In 1935, all that part of the Hundred of Youngala outside the township of Peterborough was absorbed by the new District Council of Peterborough which, like the corporate town, had its council seat within the town.