The electorate's boundary was a straight line that started at the coast between Omata and New Plymouth, and it proceeded in a south-east direction to near where Patea is located.
[1] Population centres located in the electorate included Ōpunake, Manaia, Hāwera, and Eltham.
The electorate's area was effectively increased towards the east (the easternmost boundary reached the Whanganui River), gaining a large area from the Grey and Bell electorate, and the name changed to Egmont after Mount Egmont, the original European name of Mount Taranaki.
[5] East resigned in March 1860 before the end of his term when he accepted a government appointment.
[7] The following Members of Parliament represented the Omata electorate:[3] William Crompton was returned unopposed.