Originally the area was frequented by the Boonwurrung/Bunurong people and then visited by Matthew Flinders in 1802.
The first European settlers entered the area in the 1840s seeking timber and fish and taking up pastoral leases.
The Government survey by Permein in 1854 allowed for land sales of the area called Schnapper Point/Snapper Point. A jetty was built in 1857 giving the growing township a good deep water port. This was followed by the Courthouse in 1861 and the Post Office in 1863.
The township, declared Mornington in 1861, was named after the 2nd Earl of Mornington who had been British Foreign Secretary. Mornington quickly became the major commercial and legal centre for townships and rural communities across the Peninsula. Mornington was also to become a popular bayside destination for holiday makers and day trippers.