Hassell National Park is a national park in the Great Southern region of Western Australia, 367 kilometres (228 mi) southeast of Perth and 57 km (35 mi) north east of Albany.

[2] Named after John Hassell, a retired sea captain, who was responsible for opening up extensive areas in the south of the state during the 1850s as he extended his pastoral leases east from Frankland as far as Jerramungup.

The park straddles the South Coast Highway between Manypeaks and Wellstead.

[3] The park has no entry fee and has no facilities provided for visitors.

[4] A population of the very rare Brown's Banksia, composed of 100 to 200 plants, can be found within the confines of the park.