Eucla is the easternmost locality in Western Australia, located in the Goldfields-Esperance region of Western Australia along the Eyre Highway, approximately 11 km. (7 miles) west of the South Australian border.

Eucla and the surrounding area, notably Mundrabilla and Madura, use the Central Western Time Zone, 8 hours and 45 minutes ahead of GMT (GMT+8:45).  Although it has no official sanction, it is universally observed in this area, stopping just to the east of Caiguna.