Mount Helena is a suburb on the outskirts of Perth, in Western Australia, 35 km from the city, in the Shire of Mundaring.

Mount Helena was originally known as White's Mill, a reference to Abraham White who, with Edward Vivien Harvey Keane and James Wright, in 1882 built a saw mill to supply sleepers for the construction of the Eastern Railway from Guildford to Chidlows Well.

[3] The chief instigator in the hunt for a new name was the local Progress Association whose first choice, "Hillcrest", had been rejected by the authorities because of a duplication in New South Wales.

[9] The Railway Reserve Heritage Trail passes behind the Mount Helena Tavern on its way through the suburb.

[10][11] Currently the Hills Billy Cart Festival is held annually in October by the Hills Billy Carts Inc and the Mount Helena Whim Festival is held biannually on its historic date, the last Sunday of October by the Mount Helena Residents and Ratepayers Progress Association.